1	XCN	S-cyano-L-cysteine	1.000
2	QCS	S-carbamoyl-L-cysteine	0.900
3	060	S-methyl-D-cysteine	0.889
4	SMC	S-methylcysteine	0.889
5	ECX	S-ethyl-L-cysteine	0.800
6	M0H	S-(hydroxymethyl)-L-cysteine	0.800
7	A8C	3-(methylsulfanyl)propanoic acid	0.778
8	BB9	(2z)-2-amino-3-sulfanylprop-2-enoic acid	0.778
9	CYS	Cysteine	0.778
10	DCY	D-cysteine	0.778
11	I3L	Allyl-cysteine	0.727
12	OCY	Hydroxyethylcysteine	0.727
13	SCY	S-acetyl-cysteine	0.727
14	SLZ	L-thialysine	0.727
15	SWW	(2~{S})-2-azanyl-3-(2-hydroxyethylsulfanyl)propanoic acid	0.727
16	03Y	2-methyl-L-cysteine	0.700
17	BB6	(2z)-2-amino-3-sulfanylbut-2-enoic acid	0.700
18	CG6	Beta-methyl-cysteine	0.700
19	CSB	Cys bound to lead ion	0.700
20	CSO	S-hydroxycysteine	0.700
21	CSS	S-mercaptocysteine	0.700
22	CSX	S-oxy cysteine	0.700
23	CSZ	S-selanyl cysteine	0.700
24	DEI	(2z)-2-hydroxy-3-(methylsulfanyl)prop-2-enoic acid	0.700
25	DQY	3-(dimethyl-lambda~4~-sulfanyl)propanoic acid	0.700