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Schematic overview of the 7TM receptors judged to be either stimulating (in green to the right) or inhibiting (red or orange to the left and top) ghrelin secretion directly on the ghrelin cell. The main signaling pathway (Gαs or Gαi) employed by each of the receptors in the ghrelin cell is indicated inside the receptor in black. Figure taken from Engelstoft et al., Mol Metab. 2013 [303].
