PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 17217066-4 2007 The channel is constitutively open but strongly downregulated by intracellular levels of Mg2+ and MgATP and other Mg-nucleotides. mg-nucleotides 114-128 mucin 7, secreted Homo sapiens 89-92