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.

 Five normally cycling healthy women were given daily subcutaneous injections of human leukocyte interferon ( 3 X 10 ( 6 ) units / day ) from the 3rd through 23rd day of the menstrual cycle , and serum steroid and peptide hormone concentrations monitored at 3 - day intervals during the treatment and the preceding control cycle .
human leukocyte interferon