PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16285718-7 2005 Rituximab binding is abolished by reduction and alkylation of CD20, with data consistent with the proposed antibody epitope being within the disulfide-bonded loop formed between cysteine residues 167 and 183. Cysteine 178-186 keratin 20 Homo sapiens 62-66 16285718-9 2005 Antibody binding is unaffected by mutations of cysteines proposed to be in the intracellular domain of CD20. Cysteine 47-56 keratin 20 Homo sapiens 103-107