TABLE 1.

Amino acid composition of streptin 1

Amino acid residue	Estimated no. of residuesa (mol ratio)	Expected no. of residuesb
Asp/Asn	1 (0.65)	0
Glu/Gln	0 (0.31)	0
Ser	0 (0.20)	0
Gly	2 (1.97)	2
His	0 (0)	0
Arg	1 (0.82)	1
Thr	0 (0.49)	0
Ala	0 (0.48)	0
Pro	1 (1.30)	1
Tyr	1 (0.81)	1
Lanthionine	2 (1.77)	2
Val	3 (2.98)	3
Met	0 (0)	0
Cys	0 (0)	0
Ile	0 (0)	0
Leu	2 (1.82)	2
Phe	1 (0.89)	1
Lys	2 (2.12)	2
Trp	NDc	1
Unknownd	2e (2.02)	4f
Total	18	20

^aThe number of residues was estimated from the mole ratio (shown in parentheses).

^bExpected number of amino acid residues in the streptin propeptide resulting from translation of srtA. Each thioether ring is taken to be one amino acid.

^cND, not determined.

^dThis amino acid could not be determined.

^eThis value is not accurate due to lack of knowledge about the nature of the unknown peak.

^fThis value includes three dehydrated Thr and one 3-methyllanthionine.