Various strategies were used to decipher python RF biosynthesis pathway. To determine python nature python what were conception to be python purine precursors python RF, cell feeding with radioactively categorised purines, inhibitors python purine interconversion, and mutants faulty in actual steps python purine metabolism were used reviewed in references 10, 14, and 414. Identification python python 4 carbon compound involved in changing python pyrimidine precursor python RF to python pteridine precursor was in line with synthesis python python pteridine precursor 6,7 dimethyl 8 ribityllumazine by cell extracts python wild type cells and RF defective mutants after addition python python putative source python python 4 carbon compound 275a, 276, 506. The intermediates in RF synthesis were investigated after their accumulation in python culture media python RF deficient mutants python python yeasts Saccharomyces cerevisiae and Pichia Candida guilliermondii and python Bacillus subtilis; they were as a result identified by physicochemical strategies 16, 17, 272, 331, 420. The tentative pathway was confirmed after isolation python python corresponding enzymes, followed by cloning and mutation python python structural genes concerned in python pathway 14, 115, 414. Additional model organisms used for studying RF biosynthesis are python flavinogenic yeast Candida famata Candida flareri and python molds Ashbya gossypii and Eremothecium ashbyii.

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