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Courtens, J.L. et al.

Immunocytochemical localization of protamine in the boar testis.

Protamine was specifically demonstrated in spermatids and spermatozoa of the boar by immunoelectron microscopy, using anti-boar or anti-ram protamine antisera, and three different direct or indirect labelling techniques. The two isomers of the protamine could not be labelled separately. The protamine is present in the cytoplasm of elongating spermatids and it enters the nuclei throughout the elongation process after possible storage in the cytoplasm or in the nuclear envelope of spermatids, or both. These findings differ from previous observations in other species.[1]

References

Immunocytochemical localization of protamine in the boar testis. Courtens, J.L., Plöen, L., Loir, M. J. Reprod. Fertil. (1988) [Pubmed]

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