374 results

... a growth factor for this strain. PF=3, phenylalanine auxotroph of Pseudomonas, is particularly interesting since it ... in responding to phenylpyruvic acid as well as phenylalanine , but it differs in not excreting any tyrosine. ...

... done by sticxing in two merkers - histidine and phenylalanine, It crosses with Y 24 (different phenylalanine loci), 079-680 and derivatives with sezregation of ...

... the nucleic acid coding for the amino acid phenylalanine and subsequently to codes for all 20 amino ... bases produced a protein consist- ing only of phenylalanine. Later, small amounts of other nucleic acid bases ...

... leucine and thiamin, and Y-24, requiring biotin, phenylalanine and cystine. These strains were grown in mixed ... and single mutant types requiring only thiamin or phenylalanine, In addition, double requirement types have been obtained, ...

... doing sone work with dl—n-f]uoro-phenylalanine which you supplied. it Yale, it worked as a competitive inhibitor of both phenylalanine and tyrosine, either amino acid being quite efficient. ...

... a two-step mutant from type 22 requiring phenylalanine plus tryosine, and tryptophane. Neither 2A nor 22A ... a different Salmonella strain, and encompassing requirements for phenylalanine, cystine, leucine, threonine, isoleucine + valine, pyrimidines, and purines. ...

... histidineless LT-22 Type 22 parent : SW-240 Phenylalanine and tyrosineless SW-279 SW-240 tryptophanless SW- ... mutant is plated on minimal agar supplemented with phenylalanine and tyrosine, it occasionally reverts to the first ...

... mating type;* Pa-, T-, E-, and Th-, to phenylalanine, threonine, leucine, and thiamine growth requirements, respectively; Zac—, ... the 14—Th region; IMNG64 requires tryptophan, tyrosine, phenylalanine, and p-aminobenzoic acid, owing to a single ...

... advantage of the pigment formation nor of the phenylalanine requiring mutant that it is when we are ... 2, 4, 6 and 8 mgm percent of phenylalanine. the Bacj I had the bright idea of ...

... tyr — histidine + tyrosine SB130 his. ~aro.— histidine + tyrosine + phenylalanine + tryptophan SB137 his, ~arog7 histidine + shikimic acid SB148 ... to fraction numbers 31 and 38-40. and phenylalanine. All of these markers sedimented together, indicating that ...