Über die Biosynthese des β-Carotins bei Mucor hiemalis Wehmer. Die Beteiligung der Essigsäure am Aufbau der Carotinmolekel, insbesondere in den Jonongruppierungen, untersucht mit Hilfe von 14C-markierter Essigsäure. II. Mitteilung

✍ Scribed by E. C. Grob; R. Bütler

• Publisher: John Wiley and Sons
• Year: 1954
• Tongue: German
• Weight: 336 KB
• Volume: 37
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19540370639

✦ Synopsis

Abstract

The cleavage of radioactive β‐carotene, synthesized by the fungus Mucor hiemalis Wehmer from labeled sodium acetate (^14^CH~3~ · COONa and CH~3~ · ^14^COONa) with chromic acid leads to acetic acid. This acetic acid was decarboxylated by the Schmidt reaction. The radioactivity of methylamine and carbone dioxide (BaCO~3~) obtained from the Schmidt reaction has been examinated. These experiments indicate that (1) the methyl‐groups of the labeled acetic acid form the methylgroups of the chain between the two β‐jonone rings of the β‐carotene and the methyl‐groups in the position 5 and 5′ of the β‐jonone rings; (2) the carboxylic groups of the acetic acid on the other hand form the neighbouring C‐atoms of the methyl‐groups in the chain and the β‐jonone rings.