4-Methoxy-6-indole carboxylic

Techniques for Measuring the Activity of Carboxylic Acid:CoA Ligase and Acyl‐CoA:Amino Acid N‐Acyltransferase: The Amino Acid Conjugation Pathway

of xenobiotic carboxylic acids are metabolized to their amino acid conjugates via a pathway that exists primarily in liver and kidney. This conjugation occurs in a two?step pathway catalyzed by two distince types of enzymes, ligases and transferases

Quantitation of Cocaine, Benzoylecgonine, Ecgonine Methyl Ester, and Cocaethylene in Urine and Blood Using Gas Chromatography-Mass Spectrometry (GC-MS

under the stream of nitrogen. The residue is incubated with pentafluoropropionic acid anhydride and pentafluoropropanol to form pentafluoropropionyl derivatives of ecgonine methyl ester and benzoylecgonine. Cocaine and cocaethylene are refractory to derivatization

Enzymes Acting on d-Amino Acid Containing Peptides

aminopeptidase and endopeptidase activities. The enzyme was active toward (d -Phe) n , Boc-(d -Phe) n , (d -Phe) n methyl ester, d -Phe-NH2 , Boc-(d -Phe) n methyl ester, and Boc-(d -Phe) n tert -butyl ester, but not toward (d -Ala) n (n = 2–4), (d