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. 2005 Sep;25(17):7645–7656. doi: 10.1128/MCB.25.17.7645-7656.2005

FIG. 10.

FIG. 10.

Model of the FoxO1a-to-cGKIα regulatory feedback loop controlling myoblast fusion. Upon differentiation, FoxO1a activates cGKIα transcription as well as other target genes to set the stage for myoblast cell fusion. Upon the spike of cGMP secondary messenger, FoxO1a activity is inhibited by cGKIα phosphorylation, necessary for controlled cell fusion.