Biochemical Genetics

, Volume 5, Issue 2, pp 201–209 | Cite as

A sex-limited serum protein variant in the mouse: Hormonal control of phenotypic expression

  • Howard C. Passmore
  • Donald C. Shreffler


The sex-limited protein (Slp) antigen of the mouse is first detected in the serum of strain DBA/2J males at 5–6 weeks of age and reaches full adult levels by 10 weeks. This antigen is normally absent in females. Immature DBA/2J males castrated at 3 1/2 weeks of age failed to develop Slp antigen, while DBA/2J females treated with testosterone propionate starting at 3 1/2 weeks developed normal adult male levels of Slp antigen. Similar hormone-influenced effects were demonstrated in adult males and females of the same strain. Experiments indicated that testosterone does not act directly in the serum to expose Slp antigenic sites. Testosterone treatment of both males and females of strain C57BL/10JSf, which does not carry the gene for the presence of the Slp antigen, failed to stimulate the appearance of the antigen. Thus, the presence of Slp antigen in the serum is dependent on both the proper genotype and the presence of male hormone.


Testosterone Adult Male Serum Protein Phenotypic Expression Protein Variant 
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Copyright information

© Plenum Publishing Corporation 1971

Authors and Affiliations

  • Howard C. Passmore
    • 1
  • Donald C. Shreffler
    • 1
  1. 1.Department of Human GeneticsUniversity of MichiganAnn Arbor

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