PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24956063-3 2014 Chitosan was covalently conjugated with anti-CD20 polyclonal antibody (pAbCD20) via formation of amide bonds between amines and carboxyl groups. Amines 117-123 keratin 20 Homo sapiens 45-49