Monoisotopic amino acid residue masses and immonium ion masses

(this is from ABRF not to be published)

Monoisotopic amino acid residue masses and immonium ion masses.

The designations of -, +, and ++ roughly indicate which immonium ions are most abundant. In the case of lysine, the immonium ion usually loses ammonia to give an ion at 84 u. There are a few other odd-ball amino acid fragments that have been left out of the list, but these are the main ones.

Amino acids			Residue mass	Immonium ion mass
Glycine	Gly	G	57.02147	30.03438 (-)
Alanine	Ala	A	71.03712	44.05003 (-)
Serine	Ser	S	87.03203	60.04494 (+)
Proline	Pro	P	97.05277	70.06568 (++)
Valine	Val	V	99.06842	72.08133 (++)
Threonine	Thr	T	101.04768	74.06059 (+)
Cysteine	Cys	C	103.00919	76.0221 (-)
Carbamidomethylated			160.03065	133.0436 (+)
Carboxymethylated			161.01466	134.0276 (+)
Acrylamide adduct			174.0643	147.0772 (+)
Isoleucine	Ile	I	113.08407	86.09698 (++)
Leucine	Leu	L	113.08407	86.09698 (++)
Asparagine	Asn	N	114.04293	87.05584 (+)
Aspartic acid	Asp	D	115.02695	88.03986 (+)
Glutamine	Gln	Q	128.05858	101.0715 (+)
Lysine	Lys	K	128.09497	101.1079 (84.08136)
Glutamic acid	Glu	E	129.0426	102.0555 (+)
Methionine	Met	M	131.04049	104.0534 (+)
Oxidized methionine			147.0354	120.0483 (+)
Histidine	His	H	137.05891	110.0718 (++)
Phenylalanine	Phe	F	147.06842	120.0813 (++)
Arginine	Arg	R	156.10112	129.114 (-)
Tyrosine	Tyr	Y	163.06333	136.0762 (++)
Tryptophan	Trp	W	186.07932	159.0922 (+)

Common isotope masses

^1H	1.007825
^12C	12
^14N	14.00307
^16O	15.99491
^31P	30.97376
^32S	31.97207