PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 17504458-6 2007 Exogenous CaCl2 increased NBT reduction at the pollen tube tip, suggesting that Ca2+ increases the activity of pollen NOX in vivo. Nitroblue Tetrazolium 26-29 respiratory burst oxidase homolog protein A-like Nicotiana tabacum 118-121