PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8528282-2 1995 Further investigation established a probable cause for the difference in mobility between the two: protoplasts incorporate [32P]orthophosphate into p30 at multiple sites, predominantly as phosphoserine. Phosphate-32P 123-142 centromere protein V Homo sapiens 148-151