maintenance of protein location in membrane(GO:0072658) maintenance of protein location in plasma membrane(GO:0072660) positive regulation of membrane depolarization during cardiac muscle cell action potential(GO:1900827)
regulation of metalloendopeptidase activity involved in amyloid precursor protein catabolic process(GO:1902962) negative regulation of metalloendopeptidase activity involved in amyloid precursor protein catabolic process(GO:1902963)