PROTEINS 



119 



II. MONOAMINO-DICARBOXYLIC ACIDS AND RELATED AMIDES 



COOH 

 I 

 H2N-C-H 



I 



CH, 



I 



COOH. 



COOH 



I 

 H,N— C— H 



I 

 CHj 



I 

 CO-NHz 



COOH 

 I 

 H2N-C-H 

 I 



CH, 

 I 

 CHj 



COOH 

 L-Glutamic acid or 



COOH 



I 

 H2N-C— H 



I 

 CHj 



I 

 CH, 



CONH, 



L-Glutamine 



L-Aspartic acid or L-Asparagine 

 a-aminosuccinic acid (amide of aspartic a-aminoglutaric acid (amide of glutamic 



acid) 



acid) 



III. Basic amino acids 



COOH 



I 

 H-C— NH, 



I 

 CH, 



I 

 CH, 



I 

 NH, 



COOH 



I 

 H2N-C— H 



I 

 CH, 



I 

 CH, 



I 

 O 



I 



NH, 



D-a, 7-Diaminobutyric acid 



L-Canaline; 



COOH 



I 

 H,N-C— H 



I 

 CH, 



I 

 CH, 



I 

 



I 

 NH 



I 

 C=NH 



I 

 NH, 



L-Canavanine 



COOH 



I 

 H,N-C-H 



I 

 CH2 



I 

 CH, 



I 

 CH, 



I 

 CH, 



I 

 NH, 



L-Lysine or 

 a, e-diaminocaproic acid 



COOH 



I 

 H,N-C-H 



I 

 CH 



I 

 CH, 



I 

 CHOH* 



I 

 CH, 



I 

 NH, 



L-Hydroxylysine 

 '(position of OH , whether 

 D or L, is not known) 



