A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, HPLC of Formula: C5H7NO2, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1121-89-7, Name is Piperidine-2,6-dione, molecular formula is C5H7NO2. In a Article, authors is Kempkes, Lisanne J. M.，once mentioned of 1121-89-7
Deamidation is a major fragmentation channel upon activation by collision induced dissociation (CID) for protonated peptides containing glutamine (Gln) and asparagine (Asn) residues. Here, we investigate these NH3-loss reactions for four Asn- and Gln-containing protonated peptides in terms of the resulting product ion structures using infrared ion spectroscopy with the free electron laser FELIX. The influence of the side chain length (Asn versus Gln) and of the amino acid sequence on the deamidation reaction has been examined. Molecular structures for the product ions are determined by comparison of experimental IR spectra with spectra predicted by density functional theory (DFT). The reaction mechanisms identified for the four dipeptides AlaAsn, AsnAla, AlaGln, and GlnAla are not the same. For all four dipeptides, primary deamidation takes place from the amide side chain (and not from the N-terminus) and, in most cases, resembles the mechanisms previously identified for the protonated amino acids asparagine and glutamine. Secondary fragmentation reactions of the deamidation products have also been characterized and provide further insight in ? and confirmation of ? the identified mechanisms. Overall, this study provides a comprehensive molecular structure map of the deamidation chemistry of this series of dipeptides. [Figure not available: see fulltext.]
Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about is helpful to your research. HPLC of Formula: C5H7NO2
Reference：
Piperidine – Wikipedia,
Piperidine | C5H1449N – PubChem