title: [Spectral studies of beta-melanocyte-stimulating hormone and beta-lipotropic hormone fragment].
abstract: Secondary structure of beta-melanocyte-stimulating hormone was studied by circular dichoism and infra-red spectroscopy. Left-helical conformation of poly-L-proline II type which was stabilized by temperature reduction was found in aqueous solution; in 60% ethanole the quota of this structure sharply decreased. The investigation of hormone films at different values of relative humidity (in the course of H--D metabolism) made it possible to discover a twisted beta-form and an elongated helix of poly-L-proline II type. Temperature induced changes of circular dichroism spectra specify the peculiarities of poly-L-proline II conformation in C-end fragment of beta-lipotropic hormone.
mesh_terms: D002942:Circular Dichroism; D009074:Melanocyte-Stimulating Hormones; D008968:Molecular Conformation; D013055:Spectrophotometry, Infrared; D008083:beta-Lipotropin
chemical_list: D009074:Melanocyte-Stimulating Hormones; D008083:beta-Lipotropin
vernacular_title: Spektral'nye issledovaniia beta-melanotsitostimuliruiushchego gormona i fragments beta-lipotropnogo gormona