Abstract
A chromosomal histone, H2S, specific to the mouse testis has been purified. Amino acid analysis indicated lack of cysteine and a high basic amino acid content typical of histones. Specific antibodies against histones H2S have been generated in rabbits and partially purified using (NH 4) 2SO 4 precipitation and ion-exchange chromatography. Protein transfer experiments indicate presence of antigenically similar histones in the rat and rabbit testes but not in the guinea pig and dog testes. In addition, histone complement of somatic tissues such as lung, kidney, liver and spleen lacked antigenically similar proteins. Immunocytochemical studies using peroxidase-antiperoxidase complex indicated presence of immunoreactive cells in the seminiferous epithelium which were lacking in the interstitium. These data demonstrate histone H2S to be a unique histone associated with spermatogenesis in the mouse.
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