passages.id: split_6_test_2676_passage
passages.type: progene_text
passages.text: Half - maximal binding was obtained at comparable Ca(2+) concentrations for MASP-1 and MASP-2 ( 0.45 and 0.47 micro M , respectively ) , their CUB1 - EGF - CUB2 segments ( 0.37 and 0.72 micro M ) , and their CUB1 - EGF segments ( 0.31 and 0.79 micro M ) .