PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
21665351-6	2011	According to the structural information, this titration behavior appears to be the consequence of a conformational equilibrium that depends on the protonation of some Glu residues located at the C-terminal alpha3 helix and at the hairpin formed by strands beta2 and beta3.	Glutamic Acid	167-170	basic helix-loop-helix family member e22	Homo sapiens	266-271