Titlebook: Ring Nitrogen and Key Biomolecules; The Biochemistry of E. G. Brown Book 1998 The Kluwer Academic Publishers 1998 ATP.Coenzym.Nucleotide.P

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Pteridines,enty years before the pigment was examined chemically by Hopkins. His investigations into the pigments of butterfly wings revealed that there are several of these water-soluble compounds. Subsequently, they were shown to occur widely as insect eye pigments, and one, given the name xanthopterin, was

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Indoles,A majority of these alkaloids are of complex structure but have their biosynthetic origin in the simple indole amino acid tryptophan (1) which, itself, is an important cellular constituent. The vat dye indigo (2) is also an indole and has been known and widely used since antiquity. It was prepared b

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Pyrazoles, It had previously been shown that authentic samples of pyrazole readily undergo this Al./pyridoxal-catalysed reaction with serine, and which simulates the action of the enzyme β-pyrazol-1-ylalanine synthase.

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