. "\"Combining with estrogen and transmitting the signal within the cell to trigger a change in cell activity or function.\" [GOC:signaling, PMID:17615392]" . . "estrogen receptor activity" . "For estrogen receptors that function within the nucleus to modulate transcription, consider instead annotating to the child terms 'estrogen-activated sequence-specific DNA binding RNA polymerase II transcription factor activity ; GO:0038052' or 'estrogen-activated RNA polymerase II transcription factor binding transcription factor activity ; GO:0038053'." . .