Q: 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.
This method utilises an immunomagnetic separation technique for B cell purification and a polymerase chain reaction ( PCR ) based assay for the determination of methylation status at the androgen receptor ( AR ) gene locus to assess whether X inactivation is random or non - random at this locus .
A:
androgen receptor