Kurl R N, Borthwick N M
J Endocrinol. 1979 Oct;83(1):41-51.
The concentrations of progesterone receptors in uterine cytoplasm and nuclei were measured during the oestrous cycle of the rat. The concentration of cytoplasmic progesterone receptors was highest at pro-oestrus and declined at oestrus to reach lowest levels at metoestrus before rising at dioestrus. Similar changes were observed in the concentration of nuclear progesterone receptors, the highest levels being present at pro-oestrus and dioestrus. In addition, both activities A and B of RNA polymerase mirrored these alterations in nuclear receptor levels.
在大鼠发情周期中，对子宫细胞质和细胞核中孕酮受体的浓度进行了测量。细胞质孕酮受体的浓度在动情前期最高，在发情期下降，在间情期达到最低水平，然后在动情后期上升。在细胞核孕酮受体浓度中也观察到类似变化，最高水平出现在动情前期和动情后期。此外，RNA聚合酶的A和B两种活性都反映了核受体水平的这些变化。
