title: Separation of phenylthiohydantoin-amino acids by high-pressure liquid chromatography.
abstract: A method for the separation of all phenylthiohydantoin (PTH)-amino acids except PTH-arginine and PTH-histidine by high-pressure liquid chromatography on a silica column is described. Elution is performed with a concave solvent gradient from hexane-methanol-propanol (3980:9:11) to methanol-propanol (9:11). A complete run is achieved in 40 min with a pressure drop of 1000 p.s.i. over the 250 mm X 2.1 mm column. Eluted peaks of 2-5 nmole are easily detected by their ultraviolet absorption at 254 nm. This method is superior to existing gas-liquid and thin-layer chromatographic techniques since all PTH-amino acids except PTH-arginine and PTH-histidine may be both separated and quantitated in a single run of 40 min. The use of the technique in conjunction with an automated peptide sequence analyser is illustrated.
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000032:analysis; D000595:Amino Acid Sequence; D000596:Amino Acids / Q000302:isolation & purification*; D001120:Arginine; D002116:Calcitonin / Q000032:analysis; D002845:Chromatography; D006639:Histidine; D006801:Humans; D006827:Hydantoins / Q000302:isolation & purification*; D011312:Pressure; D012997:Solvents; D013867:Thiohydantoins / Q000302:isolation & purification*; D014443:Tyrosine
chemical_list: D000596:Amino Acids; D006827:Hydantoins; D012997:Solvents; D013867:Thiohydantoins; D014443:Tyrosine; D006639:Histidine; D000324:Adrenocorticotropic Hormone; D002116:Calcitonin; D001120:Arginine