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).
metallic bond-a chemical bond in which electrons are shared over many nuclei and electronic conduction occurs. peptide bond, peptide linkage-the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide.ttraction, attractive force-the force by which one object attracts another. covalent bond-a chemical bond that involves sharing a pair of electrons between atoms in a molecule. cross-link, cross-linkage-a side bond that links two adjacent chains of atoms in a complex molecule.