11.   Tamoxifen works by blocking estrogen receptors in breast tissue.

12.   The man without estrogen receptors may lead to a radical reinterpretation of how the male and female hormones independently influence the body and brain.

13.   The new receptor proved to be slightly smaller than the original estrogen receptor, but in two significant ways it closely resembles its forerunner.

14.   The risk increases because the uterus, like the breast, has estrogen receptors.

15.   The solution is then checked for vitellogenin-mRNA, the first in a series of compounds produced after an estrogen receptor in a liver cell has been activated.

16.   They did not find a new androgen receptor, but they did detect something with the earmarks of an estrogen receptor.

17.   Cancer cells without an estrogen receptor are not affected by tamoxifen.

18.   The cells have estrogen receptors, and estrogen apparently binded to the receptors, Liu said.