title: High-performance liquid chromatography of amino acids, peptides and proteins. LVIII. Application of reversed-phase high-performance liquid chromatography to the separation of tyrosine-specific phosphorylated polypeptides related to human growth hormone.
abstract: Procedures for the purification of native and phosphorylated human growth hormone (hGH), S-carboxymethylated hGH, and hGH tryptic peptides, based exclusively on reversed-phase chromatography have been developed. Combinations of several volatile ion-pairing systems with small- and large-pore n-alkylsilicas were exploited in a general strategy, which allowed high recoveries of various hGH-related polypeptides from enzymatic incubations, as well as rapid desalting of samples following chemical modifications of the native protein, such as reductive alkylation in 6 M guanidine hydrochloride. The influence of the elution conditions on retention behaviour of phosphorylated hGH and its tryptic peptides in reversed-phase high-performance liquid chromatography is discussed.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D013006:Growth Hormone / Q000032:analysis*; D006801:Humans; D006868:Hydrolysis; D010455:Peptides / Q000032:analysis*; D010766:Phosphorylation; D014357:Trypsin; D014443:Tyrosine / Q000032:analysis*
chemical_list: D010455:Peptides; D014443:Tyrosine; D013006:Growth Hormone; D014357:Trypsin