PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6277894-9 1982 beta-Galactosidase from Aspergillus niger selectively cleaved the Gal beta 1-4GlcNAc linkage in the intact tetrasaccharide. tetrasaccharide 107-122 galactosidase beta 1 Homo sapiens 0-18