Exact Mass: 168.9642
Exact Mass Matches: 168.9642
Found 9 metabolites which its exact mass value is equals to given mass value 168.9642,
within given mass tolerance error 0.0002 dalton. Try search metabolite list with more accurate mass tolerance error
4.0E-5 dalton.
Selenocysteine
Selenocysteine is an amino acid that is present in several enzymes (for example glutathione peroxidases, tetraiodothyronine 5 deiodinases, thioredoxin reductases, formate dehydrogenases, glycine reductases and some hydrogenases). Selenocysteine has a structure similar to cysteine, but with an atom of selenium taking the place of the usual sulfur. Proteins that include a selenocysteine residue are called selenoproteins (Wikipedia). Selenocysteine is a naturally occurring amino acid in both eukaryotic and prokaryotic organisms. It is found in tRNAs and in the catalytic site of some enzymes. The genes for glutathione peroxidase and formate dehydrogenase contain the TGA codon, which codes for this amino acid (Pubchem). Formed by seleniferous plants, e.g. onion, cabbage
selenocysteine
An alpha-amino acid that consists of alanine where one of the methyl hydrogens is substituted with a seleno group.
L-selenocysteine zwitterion
Zwitterionic form of L-selenocysteine having a anionic carboxy group and a cationic amino group; major species at pH 7.3.
