Abstract
OUR previous studies on the X-linked testicular feminization (Tfm) mutation1 of the mouse2–4 showed that the so-called cytosol and nuclear 5αx-dihydrotestosterone (DHT) receptor protein5–7 might be a regulatory protein specified by the Tfm locus. The dual role of being a translational repressor in the cytoplasma and a mediator of hypertrophy in the nucleus was envisaged8. We found, however, another class of androgen-receptor in the polysome fraction of kidney proximal tubule cells which seems better qualified to be a translational regulator. Since a single gene locus specifies only one kind of polypeptide chain, we re-examined whether the cytosol and nuclear DHT-receptor protein underwent a true mutational change in Tfm/Y individuals.
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