CH(NH 2) � Cooh, arginin or guanidine-a-amino-n-valerianic acid, (NH)(NH2)C�NH� (CH 2) 3 �CH(NH 2)�Cooh, ornithin or aa-diamino valerianic acid, � (CH 2) 3 � CH(NH 2) � Coon, -(3-imidazol propionic acid, [[Hooc� Ch(Nh 2) �Ch 2 � C: Ch�N:Ch�Nh]],
proline or a-pyrrolidin carboxylic acid, [[Hooc� Ch.
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