On the presence of sulphate in pituitary lutropin

Arunasmithasri, A. S. ; Rajendrakumar, T. ; Muralidhar, K. (1983) On the presence of sulphate in pituitary lutropin Journal of Biosciences, 5 (4). pp. 355-363. ISSN 0250-5991

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Official URL: http://www.ias.ac.in/jarch/jbiosci/5/355-363.pdf

Related URL: http://dx.doi.org/10.1007/BF02716702


The presence of sulphate in the carbohydrate of pituitary lutropin from different species has been investigated using a biosynthetic approach. Pituitaries from rats, rabbits, goats, and buffaloes were incubated in the presence of 35SO4- and the 35SO4--labelled proteins in the tissue immunoprecipitated with a well characterized anti-sheep lutropin serum. The incorporation into immunoreactive lutropin was low in the case of rat, rabbit and goat pituitaries while, it was considerable in the case of buffalo pituitaries. Hence further characterization studies were carried out on 35SO4--labelled proteins of buffaloes. The physico-chemical, immunological and biological properties of radio-labelled buffalo pituitary material were shown to be similar to those of standard lutropin. Inin vitro conditions of incubations, most of the incorporation of 35SO4- was observed into tissue lutropin while under similar conditions of incubation, [14C]-amino acids were found to get incorporated mostly into medium lutropin. The physiologically specific releasing hormone, lutropin-releasing hormone was found to stimulate the release of 35SO4--labelled lutropin from the rabbit pituitaries into the medium. These results give indirect evidence that sulphate could be present in pituitary lutropin.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Sulphate Incorporation; Pituitary Hormone; Lutropin; Gonadotropin; Immunoprecipitation
ID Code:64800
Deposited On:15 Oct 2011 12:53
Last Modified:18 May 2016 13:06

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