パラアミノ安息香酸要求性大腸菌変異株に関する研究 : (I)変異菌株の生化学的変異現象と要素要求性

概要

論文の詳細を見る
Biochemical variations in PABA requiring mutants were studied. Three mutants were derived from an E. coli 0-20 standard strain and were stocked in a nutrient agar following the confirmation of responding to both of casein hydrolysate and methionine. On plating of the original cultures, only one strain gave rise to variants that responded to methionine and not to PABA. The progenies of the other two cultures were of two kinds : one of which responded to both of PABA and methionine and the other responded to neither methionine nor PABA. Of these progenies, one (223-A) was studied further and found to be subject to several types of variation. The variants which were permitted to grow maximally by casein hydrolysate were found to be more stable than the variants having other characteristics. Certain variants which responded to casein hydrolysate responded also to methionine, homocysteine and cystine in this order, some responded only to methionine and others were found to avail none of amino acids tested.
日本ビタミン学会の論文