passages.id: split_4_test_979_passage
passages.type: progene_text
passages.text: Those mutations in M4 , M6 , or M8 of SERCA1a that enhanced PLN inhibitory function did not enhance PLN physical association with SERCA1a , but mutants V795A and L802A in M6 , which decreased PLN inhibitory function , decreased physical association , as measured by co - immunoprecipitation .