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Cell biology exam 2

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amino acids

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1 / 156

Terms in this set (156)

protein monomer
60, 20 used in protein synthesis

central carbon atom in amino acid

H3N+ (acts as base)
N- (or amino) terminus

COOH
acts as acid
C- ( or carboxyl) terminus

R groups: polar, uncharged, nonpolar

side chain
dif for every amino acid
gives each amino acid distinctive properties
all amino acids except glycine have 2 stereogenic forms (D- and L-) only L- forms exist in nature
-nonpolar: ch3 groups or rings
-polar uncharged: OH, SH or NH2C=O
-polar charged: c=O(O-)H or NH3+ or NH2+ or NH+