title: Combined microassay and determination of bioactivity of N-acetylnystatin.
abstract: The application of flow microcalorimetric bioassay for polyene antibiotics to nystatin and its N-acetyl derivative, and its extension to the measurement of their relative bioactivities are reported. The responding organism was Saccharomyces cerevisae. The bioactivity of the N-acetyl derivative is shown to be less than that of the parent antibiotic and to be concentration-dependent. A limited diffusion bioassay study supports these conclusions.
authors.affiliation: Department of Chemistry, Chelsea College, University of London, Manresa Road, London SW3, England.
authors.forename: A E
authors.initials: AE
authors.lastname: Beezer
authors.forename: B Z
authors.initials: BZ
authors.lastname: Chowdhry