PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21503276-2 2011 Well-defined diblock copolymers of poly(ethylene glycol)-b-poly(methacrylic acid) (PEG-b-PMA) with PEG terminal aldehyde functionality were synthesized by atom transfer radical polymerization (ATRP) and characterized by GPC and (1)H NMR. diblock copolymers 13-31 glycophorin C Bos taurus 220-223