PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3155695-3 1985 Synexin binding to plasma membrane coated beads showed a specific requirement for calcium (K1 2 = 200 microM) and was insensitive to other divalent cations such as magnesium, strontium and barium. Magnesium 164-173 annexin A7 Homo sapiens 0-7