PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12206390-5 2002 While the first Mg2+ sensor, ETH 1117, was barely able to detect physiological Mg2+ concentrations in the presence of other mono- and divalent cations, the newest sensors allow measurements in the micromolar range. eth 29-32 mucin 7, secreted Homo sapiens 16-19