English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

SUMMARY: The effect of area: volume ratio and composition of medium on the accumulation of diazotizable amine (‘amine’) and hypoxanthine yeast 47 growing in biotin-deficient medium are reported. The ‘amine’, isolated from culture filtrates by mercury precipitation and separation on ion exchange resins, gave the Pauly reaction for imidazoles: on acid hydrolysis it yielded ribose, glycine, ammonia and formic acid, but no phosphate. These properties are consistent with the view that the ‘amine’ is 5-amino-imidazole riboside or a closely related compound. When the growth medium contained 500 μg. l-aspartic acid/ml., instead of ‘amine’ and hypoxanthine, substances accumulated which on hydrolysis yielded adenine as the only purine. ‘Amine’ accumulation by yeast 47 may be a symptom of a derangement of purine metabolism resulting from a biotin-conditioned block in aspartate synthesis.

A Diazotizable Amine Produced by Yeast: its Chemical Nature and Factors Affecting its Accumulation