374 results

... new procedure has been used to determine blood phenylalanines. A completely automated version of such an instrument ... Gas-Liquid Chromatographic Method for the Determination of Phenylalanine in Serum," Anal. Biochem, 31, 227 (1969). 11. ...

... I Gas Chromatographic Separation of Diastereoisomeric N-Trifluoroacetyl~S-—Phenylalanine-(i})alkyl Esters Structure of Asymmetric Alcohol CH,~ ... Amphetamine Desoxyephedrine Phenylglycine ethyl esters Cyclohexyiglycine ... methyl ester Cyclohexylalanine methyl ester Gas-chromatographic Separation ...

... moles of 17 hrs 34 hrs 57 hrs phenylalanine? umole pmole pmole Bmole Lys.......2.0.... 0. ... given (see the text). > Three tryptic peptides containing phenylalanine were obtained from tryptic digests of cyanogen bromide ...

... ATP in the presence of L-serine, L-phenylalanine, L-tryptophan, or p-methionine (Table V). These ... and ATP with L-methionine, L-serine, L-phenylalanine, L-tryptophan, and p-methionine Amino acid PP# ...

... this form. These acids were isoleucine, leucine, methionine, phenylalanine, threonine, tryptophane, and valine. A method was devised ... 101-105. Albanese, A. A. Colorimetric estimation of phenylalanine in some biological products. /. Biol. Chem., 1944, 755: ...

... binding. Mutations of human AR indicated that although phenylalanine 122 putatively binds ARIs, substitution of this amino ... be sequestered by a hydro- phobic bridge comprising phenylalanine 122 and leucine 300. We have begun to ...

... amino "groups in insulin and the isolation of phenylalanine and proline from crystalline insulin. Ibid., 1935, 108: ... 5- diiodo-4-(3',5' -diiodo-2'-hydroxyphenoxy) -phenylalanine, a physiologically active isomer of thyroxine. Ibid., 1941, ...

... to it — perhaps derived from it — are serine, phenylalanine, tyrosine, and cystine. Phenylalanine is a-amino-j8-phenyl propionic acid, CH2CcH5.- ... is dependent upon the benzene ring, present in phenylalanine, tyrosine and tryptophane. A positive xanthoproteic test will ...

... predictive of clinical benefit (e.g., normalization of phenylalanine levels for phenylketonuria patients). FDA encourages sponsors to ... predictive of clinical benefit (e.g., normalization of phenylalanine levels for phenylketonuria patients). FDA encourages sponsors to ...

... in tissue arginine levels thereby increasing ammonia concentrations. Phenylalanine seems to be quite nontoxic except in phenylketonuria'® in which there is a genetic absence of phenylalanine hydroxylase for conversion of phenylalanine to tyrosine. Tyrosine ...