performic acid

per·for·mic ac·id

(per-fōr'mik as'id),
An organic peracid (HCOOOH) leaving disulfide links in peptides by oxidizing cystinyl residues to cysteic acid.
Synonym(s): peroxyformic acid
References in periodicals archive ?
Performic acid was used in oxidizing the amino acids and was neutralized with sodium citrate dihydrate and then hydrolyzed with 6 N HCl for 22 hours at 110[degrees]C to be liberated from the protein.
A separate portion of the samples was oxidized with performic acid and then hydrolyzed with 6 N HCl in order to obtain reliable cysteine and methionine values [10].
Probably, the most common derivatization involves conversion of the double bonds to epoxide groups using, for example, performic acid.
The FAME was epoxidized at low temperature, with performic acid generated in situ, using benzene as a diluent for the organic phase, to minimize epoxy ring opening (31).
Activity of performic acid against spore-forming bacteria(a) Lot 1 Lot 2 Bacillus subtilis(b) 0/30 growth 0/30 growth B.
Methionine and cysteine were determined as methionine sulphone and cysteic acid using an AA Analyzer (Hitachi L-8900, Japan) after cold performic acid oxidation overnight and hydrolyzing with 7.
During this step, the hydrogen peroxide reacts with the formic acid to form performic acid.
Cysteine and methionine were analyzed after performic acid oxidation and determined as cysteic acid and methionine sulfone, respectively.
Cystine was determined as cysteic acid and methionine as methionine sulphone after peroxidation with performic acid and pre-column derivation using phenylisothiocyanate (L-8900, Automatic Amino Acid Analyzer; Hitachi, Japan).