PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23258564-5 2013 Additionally, HFI could easily precipitate and had progressive characteristics and thus, the buffer system of the additive phosphate-citric acid buffer, arginine, Triton X-100 or Tween-80, the establishment of a microfiltration, ion exchange, affinity chromatography and gel filtration chromatography-based purification process were explored. Citric Acid 133-144 major intrinsic protein of lens fiber Mus musculus 14-17