passages.id: split_5_test_3264_passage
passages.type: progene_text
passages.text: The expression of hyaluronan synthases ( 1 , 2 and 3 ) and hyaluronidases ( 1 , 2 , 3 , 4 and PH20 ) was examined in the MG63 osteoblast cell line induced to mineralize in vitro and compared to the rate of glycosaminoglycan production .