1	CSS	S-mercaptocysteine	1.000
2	SCH	S-methyl-thio-cysteine	0.889
3	TSY	(2s)-2-amino-3-trisulfanylpropanoic acid	0.889
4	3SS	3-disulfanylpropanoic acid	0.875
5	BB9	(2z)-2-amino-3-sulfanylprop-2-enoic acid	0.875
6	CYS	Cysteine	0.875
7	DCY	D-cysteine	0.875
8	SCS	3-(ethyldisulfanyl)-L-alanine	0.800
9	03Y	2-methyl-L-cysteine	0.778
10	060	S-methyl-D-cysteine	0.778
11	BB6	(2z)-2-amino-3-sulfanylbut-2-enoic acid	0.778
12	CG6	Beta-methyl-cysteine	0.778
13	CSB	Cys bound to lead ion	0.778
14	CSO	S-hydroxycysteine	0.778
15	CSX	S-oxy cysteine	0.778
16	CSZ	S-selanyl cysteine	0.778
17	SMC	S-methylcysteine	0.778
18	ALA	Alanine	0.750
19	ALV	(2s)-2-aminopropane-1,1-diol	0.750
20	DAL	D-alanine	0.750
21	DHA	2-amino-acrylic acid	0.750
22	MPT	Beta-mercaptopropionic acid	0.750
23	NAK	Amino-acrylate	0.750
24	0QL	3-[(2-aminoethyl)disulfanyl]-L-alanine	0.727
25	C1S	3-(prop-2-en-1-yldisulfanyl)-L-alanine	0.727
26	CME	S,S-(2-hydroxyethyl)thiocysteine	0.727
27	CSU	Cysteine-S-sulfonic acid	0.727
28	EFC	S,S-(2-fluoroethyl)thiocysteine	0.727
29	TQZ	2-amino-3-pentasulfanylpropan-1-ol	0.727
30	2CO	S-hydroperoxycysteine	0.700
31	CMH	S-(methylmercury)-L-cysteine	0.700
32	CSD	3-sulfinoalanine	0.700
33	CSK	S-(methylselanyl)-L-cysteine	0.700
34	CZZ	Thiarsahydroxy-cysteine	0.700
35	ECX	S-ethyl-L-cysteine	0.700
36	LE1	3-sulfanyl-L-valine	0.700
37	LEI	3-sulfanyl-D-valine	0.700
38	M0H	S-(hydroxymethyl)-L-cysteine	0.700
39	SNC	S-nitroso-cysteine	0.700
40	VI3	(2~{R})-2-azanyl-3-[bis(oxidanylidene)-$L^{5}-sulfanyl]propanoic acid	0.700
41	XCN	S-cyano-L-cysteine	0.700