Orai1 Is a Tetrameric _______ That Has Been Identified as Being

Orai1 is a tetrameric _______ that has been identified as being involved in a particular type of inherited human immune deficiency that results from a lack of Ca²⁺ stores in ________.

A) Ca²⁺ ion channel, B lymphocytes
B) Ca²⁺ ion pump, B lymphocytes
C) Ca²⁺ ion channel, T lymphocytes
D) Ca²⁺ ion pump, T lymphocytes
E) Ca²⁺ ion channel, macrophages