PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27966353-2 2017 Photoisomerization of the linear methine-bridged tetrapyrrole triggers transient proton translocation events in the chromophore binding pocket (CBP) leading to major conformational changes of the protein matrix that are in turn associated with signaling. Tetrapyrroles 49-61 CREB binding protein Homo sapiens 144-147 27966353-6 2017 This residue is not only responsible for the conformational heterogeneity of CBP in the Pr state of prokaryotic phytochromes, discussed extensively in the past, but it constitutes the sink and source of protons in the proton release/uptake mechanism involving the tetrapyrrole chromophore which finally leads to the formation of the Pfr state. Tetrapyrroles 264-276 CREB binding protein Homo sapiens 77-80