In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 Expression of oestrogen and progesterone receptors by mast cells alone , but not lymphocytes , macrophages or other immune cells in human upper airways .
progesterone receptors

 The discordant mutants may reflect interactions with a variable domain of a conserved component or unique interactions with specialized components of the basal transcription apparatus in different cells .
variable domain

 Binding of dexamethasone to cytosol and nuclear forms of the receptor complex and temperature - sensitive translocation of cytosol forms to nuclear forms were shown .

receptor complex