Thapsigargin is a cell-permeable, tumor-promoting sesquiterpene lactone that releases calcium by non-competitvley inhibiting endoplasmic reticular Ca2+-ATPase (IC₅₀ = 4-13 nM).

Estradiol (E2), also spelled oestradiol, is an estrogen steroid hormone and the major female sex hormone. It is involved in the regulation of the estrous and menstrual female reproductive cycles. Estradiol is responsible for the development of female seco