The edible portions of the leek are the white base of the leaves (above the roots and stem base), the light green parts, and to a lesser extent the dark green parts of the leaves. One of the most popular uses is for adding flavor to stock.
HOME BIOLOGY DEFINITION. Peptide bond. A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H 2 O). This is a dehydration synthesis reaction, and usually occurs between amino acids.
1. peptide bond-the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide. peptide linkage. bond, chemical bond-an electrical force linking atoms.eptide bond. n. 1. (Biochemistry) biochem a chemical amide linkage, -NH-CO-, formed by the condensation of the amino group of one amino acid with the carboxyl group of another.