Reynolds, G D Use of the chromogenic p-(p-(dimethylamino)phenylazo) benzyl (AZ) ester in the synthesis of leu-enkephalin. [electronic resource] - International journal of peptide and protein research Feb 1981 - 231-4 p. digital Publication Type: Journal Article ISSN: 0367-8377 Standard No.: 10.1111/j.1399-3011.1981.tb01986.x doi Subjects--Topical Terms: Amino AcidsAzo CompoundsChromogenic CompoundsEndorphins--chemical synthesisEnkephalin, LeucineEnkephalins--chemical synthesis