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. 2011 May 27;9:32. doi: 10.1186/1741-7007-9-32

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Copyright ©2011 Adjobo-Hermans et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Accessory proteins affect the activation state of Gq. (A) endo.: the fluorescence resonance energy transfer (FRET) ratio change (yellow fluorescent protein:monomeric Turquoise (YFP:mTq)) upon addition (arrow) of histamine (100 μmol/l) in HeLa cells expressing Gαq-mTqΔ6, Gβ1 and YFP-Gγ2. (Inset) the mTq and YFP intensity traces that belong to the ratio (n = 9; error bars depict SE). (B) +H1R: the FRET ratio change (YFP/mTq) upon addition (arrow) of histamine (100 μmol/l) in HeLa cells expressing Gαq-mTqΔ6, Gβ1, YFP-Gγ2 and histamine H1 receptor (H1R). (Inset) the mTq and YFP intensity traces that belong to the ratio. (C) +p63: the FRET ratio change (YFP/mTq) upon addition of histamine (100 μmol/l) in HeLa cells expressing Gαq-mTqΔ6, Gβ1, YFP-Gγ2 and the guanine nucleotide exchange factor p63-RhoGEF. (Inset) the mTq and YFP intensity traces that belong to the ratio (n = 9).