prefect (plural prefects) 1  An official of Ancient Rome who controlled or superintended a particular command, charge, department, etc. the prefect of the aqueducts; the prefect of a camp, of a fleet, of the city guard, or of provisions; the pretorian prefect, who was commander of the troops guarding the emperor's person.
peptide bond n. The chemical bond formed between the carboxyl groups and amino groups of neighboring amino acids, constituting the primary linkage of all protein structures. peptide bond. The chemical bond formed between amino acids, constituting the primary linkage in all protein structures. In a peptide bond, the carboxyl group (COOH) of one amino acid bonds with the amino group (NH2) of another, forming the sequence CONH and releasing water (H2O).
Structural Biochemistry/Organic Chemistry/Important Organic Reactions in Biochemistry/Peptide Bonding - Partial-Double Bond of Peptide Bond. 1  The stability of the peptide bond is due to the resonance of amides. 2  The partial double bond results in the amide group being planar thus causing them to take either the cis or trans conformation.