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Photosynthetic preparation of galactose-13C6 and glycerol-13C3 using a marine red alga

✍ Scribed by V. H. Kollman; C. T. Gregg; T. W. Whaley; R. E. London; J. L. Hanners

Publisher
John Wiley and Sons
Year
1979
Tongue
French
Weight
431 KB
Volume
16
Category
Article
ISSN
0022-2135

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✦ Synopsis

Abstract

The photosynthetic preparation of D‐galactose‐^13^C~6~ and glycerol‐^13^C~3~ from Gigartina corymbifera is described. The red marine algae biosynthesize the galactoside 2‐hydroxy‐1‐(hydroxymethyl)ethyl α‐D‐galactopyranoside (galactosylglycerol) during photosynthesis. The galactoside was isolated from an alcohol extract by an acetylation procedure and hydrolyzed to D‐galactose and glycerol. The average enrichment of the isolated products was 55 mol % ^13^C while the actual enrichment of newly synthesized material, determined by ^13^C nmr, was 80 mol % ^13^C after a photosynthetic period of 48 hr during which 90 mol % ^13^CO~2~ was administered. Thirty percent of the administered carbon was recovered in the products. The distribution of ^13^C in the galactose and glycerol was shown to be uniform by ^13^C nmr.

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