while the cytosol receptor remained low ( less than 10 fmol/mg cytosol protein ) , the nuclear estrogen receptor showed a fluctuation during the menstrual cycle , attaining the highest level during the late follicular phase ( 90.4 +/- 8.4 fmol/mg nuclear extract protein ; nearly 3-4 times the level during the early follicular and luteal phases ) .
C0033684
protein
C0028589
nuclear