L-Azidonorleucine hydrochloride, an unnatural amino acid, serves as a surrogate for Methionine. It is utilized for labeling mammalian cell proteins and identifying a broad range of methionyl-tRNA synthetase (MetRS) mutants.
10-FTHF is a donor of formyl groups in anabolism used as a substrate in formyltransferase reactions, which is important in purine biosynthesis.This compound is unstable in powder form and other related salt forms are recommended.