Affinity chromatography of phenylalanine hydroxylase. The structure of a pteridine adsorbent. 1978

R G Cotton, and I G Jennings

1. Four independent methods have established that the structure of a previously reported pteridine affinity adsorbent, 6,7-dimethyl-5,6,7,8-tetrahydropterin--CH-Sepharose, is 5(CH-Sepharosyl)-6,7-dimethyl-5,6,7,8-tetrahydropterin. 2. A novel reaction, the carbodiimide-promoted coupling of a carboxyl group to N-5 of a tetrahydropterin, is described. 3. Two novel adsorbents, 5-formyl-tetrahydrofolate--AH-Sepharose and 5-methyl-tetrahydrofolate--AH-Sepharose, are described which may be useful not only in the study of phenylalanine hydroxylase but also in the study of folate-metabolizing enzymes.

UI MeSH Term Description Entries
D010651 Phenylalanine Hydroxylase An enzyme of the oxidoreductase class that catalyzes the formation of L-TYROSINE, dihydrobiopterin, and water from L-PHENYLALANINE, tetrahydrobiopterin, and oxygen. Deficiency of this enzyme may cause PHENYLKETONURIAS and PHENYLKETONURIA, MATERNAL. EC 1.14.16.1. Phenylalanine 4-Hydroxylase,Phenylalanine 4-Monooxygenase,4-Hydroxylase, Phenylalanine,4-Monooxygenase, Phenylalanine,Hydroxylase, Phenylalanine,Phenylalanine 4 Hydroxylase,Phenylalanine 4 Monooxygenase
D011621 Pteridines Compounds based on pyrazino[2,3-d]pyrimidine which is a pyrimidine fused to a pyrazine, containing four NITROGEN atoms. 1,3,5,8-Tetraazanaphthalene,Pteridine,Pteridinone,Pyrazino(2,3-d)pyrimidine,Pyrazinopyrimidine,Pyrazinopyrimidines,Pyrimido(4,5-b)pyrazine,Pteridinones
D002846 Chromatography, Affinity A chromatographic technique that utilizes the ability of biological molecules, often ANTIBODIES, to bind to certain ligands specifically and reversibly. It is used in protein biochemistry. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Chromatography, Bioaffinity,Immunochromatography,Affinity Chromatography,Bioaffinity Chromatography
D000327 Adsorption The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily. Adsorptions

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