passages.id: split_8_test_1639_passage
passages.type: progene_text
passages.text: The induction of Tlx2 - luc was dependent upon the kinase activity of MISRII and was blocked by a dominant negative truncated ALK2 ( tALK2 ) receptor but not by truncated forms of the other BMP type I receptors ALK1 , ALK3 , or ALK6 .