title: A coupled spectrophotometric enzyme assay for methyltransferases.
mesh_terms: D000241:Adenosine; D000619:Aminohydrolases; D000818:Animals; D001230:Aspergillus / Q000201:enzymology; D001921:Brain / Q000201:enzymology; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D004590:Electrophoresis, Paper; D005069:Evaluation Studies as Topic; D006168:Guinea Pigs; D006632:Histamine; D006710:Homocysteine; D007700:Kinetics; D008722:Methods; D008780:Methyltransferases / Q000032:analysis* / Q000378:metabolism; D008832:Microchemistry; D010870:Pineal Gland / Q000201:enzymology; D012436:S-Adenosylmethionine; D012441:Saccharomyces cerevisiae / Q000201:enzymology; D012701:Serotonin; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D006710:Homocysteine; D012701:Serotonin; D012436:S-Adenosylmethionine; D006632:Histamine; D008780:Methyltransferases; D000619:Aminohydrolases; D000241:Adenosine