374 results

... valine, i-leucine, leucine, proline, methionine, aspartic acid, phenylalanine, tyrosine, glutamic acid and lysine. In view of ... A Defect in the Metabolisn of Tyrosine and Phenylalanine in Preaature Infants, I: Identification ani Assay of ...

... the enzyme is an accumulation of a substance, phenylalanine, in the blood, which normally is transformed by ... by the presence of an abnormal derivative of phenylalanine in the urine. It took twenty years to ...

... re- quires tyrosine for grovth(and cannot use phenylalanines)It does not do this even in the presence of excess phenylalanine which can reverse the inhibitory effect of FPA, ...

... referred to me your recent letter requesting a phenylalanine auxotroph in E. coli. I am enclosing K12 ... 58-278, which we have used extensively for phenylalanine assays in the course of isolating prephenic acid ( ...

... essential metabolites as follows: B=biotin M = methionine = phenylalanine P=proline C=cystine T=threonine R=Resistance ... proline-threonineless (B+®*C*P-T-) and biotin-phenylalanine-cystineless (B-®C-P*T*) plated into agar ...

... X-ray 2 thiamine 58-278 2 Biotin, phenylalanine B-¢— 58 X-ray 1 Y¥24 3 Biotin, phenylalanine, B-—¢-C— 58-278 | Ultraviolet 2 eystine ¥38 ... which is deficient in the synthesis of biotin, phenylalanine, and cystine. On the other hand, particular emphasis ...

... GROUPINCS* . Lysine, arginine, methionine, cystine . Leucine, isoleucine, valine . Phenylalanine, tyrosine, tryptophane . Histidine, threonine, glutamic acid, proline, aspartic ...

... helpful in the use of this organism for phenylalanine determinations on simple blood analyses for this amino ... subculture of organisms which we can use with phenylalanine deficient media. Just wanted you to know that ...

... chemi- cal action of aqueous HOCI® on L-phenylalanine, L-tyrosine, L-glutamic acid, L-cys- tine ... R'=Cl xm, R = COOH Reaction of L-phenylalanine with HOC! Two products were obtained from the ...

... contain all amino acids (25 ug/ml) except phenylalanine, histi- dine, tryptophan, and tyrosine, respectively. The media ... and 200 tyrA* transformants from each treatment to phenylalanine-, histidine-, and tyrosine-deficient media. 800 600 ; 400 | ...