\documentclass[10pt,a4paper]{article} % Packages \usepackage{fancyhdr} % For header and footer \usepackage{multicol} % Allows multicols in tables \usepackage{tabularx} % Intelligent column widths \usepackage{tabulary} % Used in header and footer \usepackage{hhline} % Border under tables \usepackage{graphicx} % For images \usepackage{xcolor} % For hex colours %\usepackage[utf8x]{inputenc} % For unicode character support \usepackage[T1]{fontenc} % Without this we get weird character replacements \usepackage{colortbl} % For coloured tables \usepackage{setspace} % For line height \usepackage{lastpage} % Needed for total page number \usepackage{seqsplit} % Splits long words. %\usepackage{opensans} % Can't make this work so far. Shame. Would be lovely. \usepackage[normalem]{ulem} % For underlining links % Most of the following are not required for the majority % of cheat sheets but are needed for some symbol support. \usepackage{amsmath} % Symbols \usepackage{MnSymbol} % Symbols \usepackage{wasysym} % Symbols %\usepackage[english,german,french,spanish,italian]{babel} % Languages % Document Info \author{abcedf (abcdef)} \pdfinfo{ /Title (cell-and-molec-biology-ch2-chemistry-of-the-cell.pdf) /Creator (Cheatography) /Author (abcedf (abcdef)) /Subject (Cell \& Molec. Biology Ch2- Chemistry of the Cell Cheat Sheet) } % Lengths and widths \addtolength{\textwidth}{6cm} \addtolength{\textheight}{-1cm} \addtolength{\hoffset}{-3cm} \addtolength{\voffset}{-2cm} \setlength{\tabcolsep}{0.2cm} % Space between columns \setlength{\headsep}{-12pt} % Reduce space between header and content \setlength{\headheight}{85pt} % If less, LaTeX automatically increases it \renewcommand{\footrulewidth}{0pt} % Remove footer line \renewcommand{\headrulewidth}{0pt} % Remove header line \renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit % This two commands together give roughly % the right line height in the tables \renewcommand{\arraystretch}{1.3} \onehalfspacing % Commands \newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour \newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols \newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns \newcommand{\tn}{\tabularnewline} % Required as custom column type in use % Font and Colours \definecolor{HeadBackground}{HTML}{333333} \definecolor{FootBackground}{HTML}{666666} \definecolor{TextColor}{HTML}{333333} \definecolor{DarkBackground}{HTML}{3F8C54} \definecolor{LightBackground}{HTML}{F3F7F4} \renewcommand{\familydefault}{\sfdefault} \color{TextColor} % Header and Footer \pagestyle{fancy} \fancyhead{} % Set header to blank \fancyfoot{} % Set footer to blank \fancyhead[L]{ \noindent \begin{multicols}{3} \begin{tabulary}{5.8cm}{C} \SetRowColor{DarkBackground} \vspace{-7pt} {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}} } \end{tabulary} \columnbreak \begin{tabulary}{11cm}{L} \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Cell \& Molec. Biology Ch2- Chemistry of the Cell Cheat Sheet}}}} \\ \normalsize{by \textcolor{DarkBackground}{abcedf (abcdef)} via \textcolor{DarkBackground}{\uline{cheatography.com/163233/cs/34215/}}} \end{tabulary} \end{multicols}} \fancyfoot[L]{ \footnotesize \noindent \begin{multicols}{3} \begin{tabulary}{5.8cm}{LL} \SetRowColor{FootBackground} \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}} \\ \vspace{-2pt}abcedf (abcdef) \\ \uline{cheatography.com/abcdef} \\ \end{tabulary} \vfill \columnbreak \begin{tabulary}{5.8cm}{L} \SetRowColor{FootBackground} \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}} \\ \vspace{-2pt}Not Yet Published.\\ Updated 16th September, 2022.\\ Page {\thepage} of \pageref{LastPage}. \end{tabulary} \vfill \columnbreak \begin{tabulary}{5.8cm}{L} \SetRowColor{FootBackground} \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}} \\ \SetRowColor{white} \vspace{-5pt} %\includegraphics[width=48px,height=48px]{dave.jpeg} Measure your website readability!\\ www.readability-score.com \end{tabulary} \end{multicols}} \begin{document} \raggedright \raggedcolumns % Set font size to small. Switch to any value % from this page to resize cheat sheet text: % www.emerson.emory.edu/services/latex/latex_169.html \footnotesize % Small font. \begin{multicols*}{3} \begin{tabularx}{5.377cm}{X} \SetRowColor{DarkBackground} \mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Ionic Bonds}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{p{5.377cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/abcdef_1663293060_nacl ionic bonds.png}}} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{Electrons transfer to the more electronegative element, creating ions} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.73735 cm} x{2.23965 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Chemical Bond Strength}} \tn % Row 0 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Covalent bonds are {\bf{strong}}} \tn % Row Count 1 (+ 1) % Row 1 \SetRowColor{white} Weak noncovalent: & \textgreater{}ionic \tn % Row Count 2 (+ 1) % Row 2 \SetRowColor{LightBackground} & \textgreater{}hydrogen \tn % Row Count 3 (+ 1) % Row 3 \SetRowColor{white} & \textgreater{}van der waals \tn % Row Count 4 (+ 1) \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.18988 cm} x{2.78712 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Composition of a Cell}} \tn % Row 0 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Water} \tn % Row Count 1 (+ 1) % Row 1 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}cytoplasm, lumen, inside nucleus, etc.} \tn % Row Count 2 (+ 1) % Row 2 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Inorganic ions} \tn % Row Count 3 (+ 1) % Row 3 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}Fe\textasciicircum{}2+/3+\textasciicircum{}, Ca\textasciicircum{}2+\textasciicircum{}, Mg\textasciicircum{}2+\textasciicircum{}, K\textasciicircum{}+\textasciicircum{}, Na\textasciicircum{}+\textasciicircum{}, Cl\textasciicircum{}-\textasciicircum{}, PO4\textasciicircum{}2-\textasciicircum{}, etc.} \tn % Row Count 5 (+ 2) % Row 4 \SetRowColor{LightBackground} \textgreater{}many function as {\bf{cofactors}} & \textgreater{}pieces of a protein aside from amino acid that is needed for protein to carry out function \tn % Row Count 10 (+ 5) % Row 5 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{Organic Molecules} \tn % Row Count 11 (+ 1) % Row 6 \SetRowColor{LightBackground} \textgreater{}4 major classes & \textgreater{}Carbohydrates, Proteins, Nucleic Acids, Lipids \tn % Row Count 14 (+ 3) % Row 7 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}3 are polymers, Lipids are {\emph{not}}} \tn % Row Count 15 (+ 1) \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Nucleic Acids}} \tn % Row 0 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA)} \tn % Row Count 2 (+ 2) % Row 1 \SetRowColor{white} Monomer: {\bf{Nucleotide}} & \textgreater{}5 carbon sugar, charged phosphate group, nitrogenous base \tn % Row Count 5 (+ 3) % Row 2 \SetRowColor{LightBackground} \textgreater{}Deoxynucleotide (ATGC) - deoxyribose - lacking 1 oxygen & \textgreater{}Ribonucleotide (AUGC) - ribose \tn % Row Count 8 (+ 3) % Row 3 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{{\bf{Nitrogenous Bases}}} \tn % Row Count 9 (+ 1) % Row 4 \SetRowColor{LightBackground} Pyrimidine: cytosine, uracil, thymine & Purine: guanine, adenine \tn % Row Count 11 (+ 2) % Row 5 \SetRowColor{white} \textgreater{}CUT the py & \textgreater{}Pur As Gold \tn % Row Count 12 (+ 1) % Row 6 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Nucleotides are joined by {\bf{phosphodiester bonds}}} \tn % Row Count 13 (+ 1) % Row 7 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}forms sugar-phosphate backbone} \tn % Row Count 14 (+ 1) % Row 8 \SetRowColor{LightBackground} RNA functions for information transfer and processing (how much proteins are produced, how much gene expression, etc.) & DNA functions for information storage \tn % Row Count 20 (+ 6) % Row 9 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}RNA also functions for enzymatic activity (catalyze reactions) in form called {\bf{Ribozymes}}} \tn % Row Count 22 (+ 2) % Row 10 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Nucleotide derivatives (ATP, GTP) also have important functions:} \tn % Row Count 24 (+ 2) % Row 11 \SetRowColor{white} \textgreater{}{\emph{Energy}}- Adenosine triphosphate, guanosine triphosphate, nicotinamide adenine dinucleotide & \textgreater{}ATP, GTP, NADH \tn % Row Count 29 (+ 5) % Row 12 \SetRowColor{LightBackground} \textgreater{}{\emph{Intracellular signaling}}- Cyclic AMP (adenosine monophosphate) & \textgreater{}for vasodilation and constriction \tn % Row Count 33 (+ 4) \hhline{>{\arrayrulecolor{DarkBackground}}--} \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Transcription is polymerization of ribonucleotides. \newline Translation is polymerization of amino acids. \newline Replication is polymerization of deoxynucleotides.} \tn \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{X} \SetRowColor{DarkBackground} \mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Covalent Bonds}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{p{5.377cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/abcdef_1663293438_water.png}}} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{Electrons are shared, either equally (nonpolar) or unequally (polar). \newline An example of nonpolar is methane, and and example of polar is water. \newline {\bf{Nonpolar}}- think C-H and C-C bonds \newline {\bf{Polar}}- think O-H, N-H, and S-H bonds} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Lipids}} \tn % Row 0 \SetRowColor{LightBackground} {\bf{NOT POLYMERS}} & \textgreater{}not chains and not repeating \tn % Row Count 2 (+ 2) % Row 1 \SetRowColor{white} All display degree of {\emph{hydrophobic}} behavior & \textgreater{}water insoluble due to predominantly nonpolar bonds \tn % Row Count 5 (+ 3) % Row 2 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Simplest lipids are fatty acids} \tn % Row Count 6 (+ 1) % Row 3 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{Some are {\emph{amphipathic}}- both hydrophobic and hydrophilic in one molecule} \tn % Row Count 8 (+ 2) % Row 4 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Triglycerols}}- aka triglycerides or "fats"} \tn % Row Count 9 (+ 1) % Row 5 \SetRowColor{white} \textgreater{}glycerol + 3 fatty acids & \textgreater{}function as energy/metabolism (fatty acid -\textgreater{} Acetyl CoA for citric acid cycle) \tn % Row Count 13 (+ 4) % Row 6 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Phospholipids}}} \tn % Row Count 14 (+ 1) % Row 7 \SetRowColor{white} \textgreater{}glycerol + 2 fatty acids + 1 polar head group & \textgreater{}fatty acids=hydrophobic, polar head group=hydrophilic \tn % Row Count 17 (+ 3) % Row 8 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}{\emph{very}} amphipathic (orientation of double bilayer membrane)} \tn % Row Count 19 (+ 2) % Row 9 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}key components of membrane structure} \tn % Row Count 20 (+ 1) % Row 10 \SetRowColor{LightBackground} \textgreater{}signaling & (not just proteins doing inter \& intracellular signaling) \tn % Row Count 23 (+ 3) % Row 11 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{{\bf{Lipid Diversity}} - Sources of Diversity:} \tn % Row Count 24 (+ 1) % Row 12 \SetRowColor{LightBackground} 1. fatty acid length & \textgreater{}about 14-20 carbons long (tends to be even \#s) \tn % Row Count 27 (+ 3) % Row 13 \SetRowColor{white} 2. number of C-C bonds in fatty acids & \textgreater{}{\bf{saturated}}- more H due to all single bonds \tn % Row Count 30 (+ 3) \end{tabularx} \par\addvspace{1.3em} \vfill \columnbreak \begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Lipids (cont)}} \tn % Row 14 \SetRowColor{LightBackground} & \textgreater{}{\bf{unsaturated}}- less H due to double C=C bond \tn % Row Count 3 (+ 3) % Row 15 \SetRowColor{white} 3. variability in molecule attached to glycerol & \textgreater{}fatty acid species, type of polar head group (phospholipids), oligosaccharides (glycolipids) \tn % Row Count 8 (+ 5) % Row 16 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Sterols/Steroids}}} \tn % Row Count 9 (+ 1) % Row 17 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{Nonpolar, hydrophobic} \tn % Row Count 10 (+ 1) % Row 18 \SetRowColor{LightBackground} Functions for cell membrane structure & \textgreater{}cholesterol, ergosterol \tn % Row Count 12 (+ 2) % Row 19 \SetRowColor{white} Functions as hormones & \textgreater{}testosterone, progesterone, estrogen \tn % Row Count 14 (+ 2) % Row 20 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Functions for vitamin synthesis} \tn % Row Count 15 (+ 1) \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Hydrogen Bonding}} \tn % Row 0 \SetRowColor{LightBackground} responsible for the basic properties of water & \textgreater{}adhesion, cohesion, density \tn % Row Count 3 (+ 3) % Row 1 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{H-bonding starts with {\emph{polar}} covalent bonding with a positively charged Hydrogen} \tn % Row Count 5 (+ 2) % Row 2 \SetRowColor{LightBackground} {\bf{Hydrophilic}}- polar covalent, like water & {\bf{Hydrophobic}}- nonpolar covalent, unlike water \tn % Row Count 8 (+ 3) % Row 3 \SetRowColor{white} \textgreater{}eg. acetone & eg. 2-methyl-propane \tn % Row Count 9 (+ 1) % Row 4 \SetRowColor{LightBackground} {\emph{Intramolecular}} H-bonding: biological molecules H-bond within themselves & {\emph{Intermolecular}} H-bonding: biological molecules H-bond with other molecules \tn % Row Count 13 (+ 4) % Row 5 \SetRowColor{white} \textgreater{}eg. proteins & \textgreater{}eg. nucleotide base pairing \tn % Row Count 15 (+ 2) \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.93643 cm} x{2.04057 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Polymers}} \tn % Row 0 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Monomer}} (1) -\textgreater{} {\bf{Dimer}} (2) -\textgreater{} {\bf{Oligomer}} (few) -\textgreater{} {\bf{Polymer}} (many)} \tn % Row Count 2 (+ 2) % Row 1 \SetRowColor{white} {\bf{Polymerization}}- completed with {\bf{Dehydration Synthesis}}/{\bf{Condensation}} reactions & \textgreater{}2 monomers condensed= dimer \tn % Row Count 6 (+ 4) % Row 2 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Hydrolysis}} reactions break} \tn % Row Count 7 (+ 1) \hhline{>{\arrayrulecolor{DarkBackground}}--} \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{Draw diagrams of dehydration synthesis and hydrolysis} \tn \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Sugars (Carbohydrates)}} \tn % Row 0 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Monosaccharides}} -\textgreater{} {\bf{Oligosaccharides}} -\textgreater{} {\bf{Polysaccharides}}} \tn % Row Count 2 (+ 2) % Row 1 \SetRowColor{white} \textgreater{}Monosaccharides- (CH2O)n & \textgreater{}glucose, fructose, galactose - typically 5 or 6 carbon sugars, joined by {\bf{glycosidic linkages}} \tn % Row Count 7 (+ 5) % Row 2 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Monosaccharides}}} \tn % Row Count 8 (+ 1) % Row 3 \SetRowColor{white} \textgreater{}role of energy generation & \textgreater{}Glucose -\textgreater{} ATP produced \tn % Row Count 10 (+ 2) % Row 4 \SetRowColor{LightBackground} \textgreater{}synthesis of/conversion to other molecules & \textgreater{}ribose/deoxyribose \tn % Row Count 13 (+ 3) % Row 5 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{{\bf{Oligosaccharides}}} \tn % Row Count 14 (+ 1) % Row 6 \SetRowColor{LightBackground} \textgreater{}Glycosylation- covalently join to proteins and lipids on extracellular cell surface & \textgreater{}glycoproteins, glycolipids, protein structure, cell-cell structure, {\emph{cell-cell adhesion}}, {\emph{cell identification}} \tn % Row Count 20 (+ 6) % Row 7 \SetRowColor{white} \mymulticolumn{2}{x{5.377cm}}{{\bf{Polysaccharides}}} \tn % Row Count 21 (+ 1) % Row 8 \SetRowColor{LightBackground} \textgreater{}energy storage & \textgreater{}in form of starch (polymer of glucose in plants), and glycogen (animal equivalent of starch, in muscle cells) \tn % Row Count 27 (+ 6) % Row 9 \SetRowColor{white} \textgreater{}cell structure & \textgreater{}cellulose (cell wall component in plants, glucose=monomer), and chitin (fungi cell wall, monomer=glucose variant) \tn % Row Count 33 (+ 6) \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} \begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} } \SetRowColor{DarkBackground} \mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Proteins}} \tn % Row 0 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Amino acids}} -\textgreater{} {\bf{(Oligo)peptides}} (small stretch of a.a.) -\textgreater{} {\bf{Peptides}} (sometimes finished, sometimes unfinished)-\textgreater{} {\bf{Proteins}} (finally folded and funcitonable)} \tn % Row Count 4 (+ 4) % Row 1 \SetRowColor{white} \textgreater{}20 different amino acids (R side chain) & \textgreater{}not identical, but similar (concept of a monomer) \tn % Row Count 7 (+ 3) % Row 2 \SetRowColor{LightBackground} \textgreater{}can be charged at cytosolic pH (in cell) & \textgreater{}amine group functions as base and picks up H\textasciicircum{}+\textasciicircum{}, carboxylic acid donates H\textasciicircum{}+\textasciicircum{} \tn % Row Count 11 (+ 4) % Row 3 \SetRowColor{white} \textgreater{}a.a. joined by {\bf{peptide bonds}} through dehydration synthesis & \textgreater{}joined at carboxyl and amine group (H of NH2 and OH of COOH) \tn % Row Count 15 (+ 4) % Row 4 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{{\bf{Protein Structure and Function}}} \tn % Row Count 16 (+ 1) % Row 5 \SetRowColor{white} \textgreater{}Functional diversity & \textgreater{}Structural diversity \tn % Row Count 18 (+ 2) % Row 6 \SetRowColor{LightBackground} \mymulticolumn{2}{x{5.377cm}}{\textgreater{}metabolism, DNA replication, structure and motility, transport, communication} \tn % Row Count 20 (+ 2) \hhline{>{\arrayrulecolor{DarkBackground}}--} \end{tabularx} \par\addvspace{1.3em} % That's all folks \end{multicols*} \end{document}