Voet Chapter 4 solutions to 1-7,11

Voet Chapter 4 solutions to 1-7,11 - C hapter 4 A mino A...

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Chapter 4 Amino Acids 1. See Table 4-1 for the names and abbreviations of the standard amino acids. Leu and De are isomers whereas neutral Lys and GIn have essentially the same molecular masses. 2. (a) H 2 N NHi " .,y S-CH C I 3 I CH z NH I I CH z CH z (CH Z )3 0 + I I I ~ H;jN-C-C-NH-C--C- NH-C--C I" I II I "0 H 0 H 0 H (b) _N j NH 3 + CO 2 Qq H I I CH z 2 )4 CH z 0 + I I I ~ H N- CH~ C - NH- CH- c- NH-- CH- C 3 II II " _ 0 00
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28 Chapter 4. Amino Acids (c) o ~ / C NB z CH 3 P-N I CH z 1 I CH 2 I HN y // CBs I + CH 2 I CHCH 3 I CH z I HC-OB 0 I ~ H N - CH- C ~ NH - CH - C - NH - CH- C- NH - CH- C 3 1/ o II 0 II 0 " _ 0 3. The first residue can be one of five residues, the second one of the remaining fOlH, ptc. N =- 5 x 4 x 3 x 2 x 1 = 120 4. CH( CHs)z + I H N- CH- C- NH- CH- COO- 3 II I o CH z I S I S CH z I / ~ CH z OH 2 C\H z jCH 2 + I I H C- N - 3 II II o 0 5. Henderson-Hasselbalch: pH = pK+log([A-]) [HA] For lysine: (CHZ)4NH~ (CH2)4NH~ o. (CH'l)4NH~ (CH Z )4 NHz + I pl\J=2.16 + I pK z =v.06 I . pl\,=10.54 I H 3 N-CH-COOT-l ... H,N-CH-COO-" ... H 2 N-CH-COO-" .
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Voet Chapter 4 solutions to 1-7,11 - C hapter 4 A mino A...

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