ISSN:
1432-2048
Keywords:
Ascorbic acid biosynthesis
;
Bacillariophyta
;
Cyclotella
;
Glucosamine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract l-Ascorbic acid (AA) production in cells of Cyclotella cryptica Reimann, Lewin, Guillard (Bacillariophyceae) is enhanced when darkadapted cells are exposed to light.Heterotrophically grown cells incubated with d-[6-3H,6-14C]glucose and d-[1-3H,6-14C]glucose (2 h in dark followed by 15 h light) produced labeled AA with significantly different ratios of 3H and 14C. Comparisons of labeling patterns in AA and chitin-derived d-glucosamine support a path of conversion in Cyclotella from d-glucose to AA that “inverts” the carbon chain of the sugar. This process resembles similar conversions found in AA-synthesizing animals and species from two other algal classes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00392459
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