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.
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.