✦ LIBER ✦

The biological functions of pteridine derivatives

✍ Scribed by Totter, John R.

Publisher: Wiley (John Wiley & Sons)
Year: 1953
Tongue: English
Weight: 944 KB
Volume: 41
Category: Article
ISSN: 0095-9898
DOI: 10.1002/jcp.1030410415

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✦ Synopsis

The pyrimido-pyrazines for which the name " pteridine" was suggested by Wieland (Schopf et al., '41) are of very widespread occurrence in nature. Simpler derivatives such as leucopterin, xanthopterin, and isoxanthopterin a r e found in butterflies (Purrmann, '45), certain insects (Schopf and Becker, '36), in human urine (Iioschara, '36), and probably in bacteria (Crowe and Walker, '44). More complex deriva-

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