The procedure described utilizes a crude cell-free extract from the yeast Saccharomyces cerevisiae as enzymatic source for the synthesis of coproporphyrin III from [r4C]G-aminolevulinic acid with a high yield of conversion (-60%). Roth specific radioactivity and total radioactivity of coproporphyrin
Synthesis of 14C-uridine-5′ -triphosphate by enzymes of escherichia coli cell-free extracts
✍ Scribed by P. Pumpen; E. Gren
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- French
- Weight
- 379 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Crude cell‐free extracts of Escherichia coli AB 259 Hfr 3000, thi‐perform multistep conversion of ^14^C‐uracil to ^14^C‐UTP in vitro in the presence of D‐ribose/or ribose‐5‐phosphate/, ATP and ATP‐regenerating system. ATP concentration is crucial for significant ^14^C‐UTP production. Quantitative yield of the product combined with relatively simple procedure and inexpensiveness of initial materials makes the method advantageous for large‐scale preparation of ^14^C‐UTP.
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