PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 26047337-1 2015 beta-Galactosidase was immobilized on chitosan-coated magnetic Fe3O4 nanoparticles and was used to produce galactooligosaccharides (GOS) from lactose. ferryl iron 63-68 galactosidase beta 1 Homo sapiens 0-18