passages.id: split_1_test_2516_passage
passages.type: progene_text
passages.text: Since the thymus is the primary location of the T-cell - lymphopoiesis , we investigated the effect of trauma - haemorrhage to thymic prolactin - receptor ( PRLr ) - expression in male and proestrus female mice in three different age groups ( young , adult , aged ) by flow cytometry and PCR .