PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 14631070-1 2003 In spite of the high similarity of amino acid sequence and three-dimensional structure between soybean beta-amylase (SBA) and sweet potato beta-amylase (SPB), their quaternary structure is quite different, being a monomer in SBA and a tetramer in SPB. spb 153-156 beta-amylase Glycine max 139-151