Froidevaux R, Lignot B, Nedjar-Arroume N, Guillochon D, Coddeville B, Ricart G
Laboratoire de Technologie des Substances Naturelles, IUT A Lille 1, Villeneuve d'Ascq, France.
J Chromatogr A. 2000 Mar 24;873(2):185-94. doi: 10.1016/s0021-9673(99)01353-9.
Reversed-phase high-performance liquid chromatography coupled with electrospray ionization mass spectrometry was used to improve the preparation of three opioid peptides (Leu-Val-Val-hemorphin-7, Val-Val-hemorphin-7 and Val-Val-hemorphin-4) resulting from bovine hemoglobin peptic hydrolysates. Optimal conditions for the preparation of these peptides were determined thanks to their kinetic studies of appearance in the course of peptic hydrolyses as a function of degree of hydrolysis of hemoglobin. We propose a low degree of hydrolysis (3%) to prepare Leu-Val-Val-hemorphin-7, a mean degree of hydrolysis (11%) to prepare Val-Val-hemorphin-7 and a high degree of hydrolysis (21%) to prepare Val-Val-hemorphin-4.
