>4P0O_1|Chain A|Serine protease inhibitor 4, isoform B|Drosophila melanogaster (7227) MMADAAHQEFARRLALFSINVYGKLSGQKPGENIVFSPFSIQTCAAMARLGAENETATQLDQGLGLASSDPEQIAHSFHQVLAAYQDSQILRIANKIFVMDGYQLRQEFDQLLSKQFLSAAQSVDFSKNVQAAATINNWVEQRTNHLIKDLVPADVLNSESRLVLVNAIHFKGTWQHQFAKHLTRPDTFHLDGERTVQVPMMSLKERFRYADLPALDAMALELPYKDSDLSMLIVLPNTKTGLPALEEKLRLTTLSQITQSLYETKVALKLPRFKAEFQVELSEVFQKLGMSRMFSDQAEFGKMLQSPEPLKVSAIIHKAFIEVNEEGTEAAAATGMAVRRKRAIMSPEEPIEFFADHPFTYVLVHQKDLPLFWGSVVRLEENTFASSEHDEL