hormones with molecular weights of less than 4000 ( angiotensin ii , thyroxine , 17-hydroxyprogesterone , progesterone , testosterone and androstenedione ) passed freely through the pores but larger molecules , with molecular weights in excess of 10,000 ( parathyroid hormone , human gh , tsh ) could not .
C0020387
17-hydroxyprogesterone
C0033308
progesterone