.~ Containing modified or unusual amino acid (See note 1 and note 2) {5}
24
.~.~ Containing sulfur (See note 4)
DEFINITION
Classification: 930/24
Containing sulfur:
Subject matter under cross-reference art collection 20 containing a peptide or protein containing a sulfur other than a sulfur which is merely a part of one of the natural amino acids, cysteine, cystine, or methionine.