PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 31151526-3 2019 Alg gel beads crosslinked by calcium ion Ca(II) could adsorb and remove Cu(II), but the beads released significant amount of Ca(II). Calcium 29-36 carbonic anhydrase 2 Homo sapiens 41-47