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).
They are long, elongated, thread-like and asymmetric in shape. They are spherical, oval or elliptical in shape. 2. The peptide chains are held together by strong intermolecular hydrogen bonds. The peptide chains are held together by relatively weak intramolecular hydrogen bonds. 3.