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. 2018 Sep 25;471(2):313–327. doi: 10.1007/s00424-018-2208-y

Fig. 9.

Fig. 9

Proposed model for the regulation of K+ secretion by butyrate in rat rectal colon. Butyrate was transported into epithelial cells via monocarboxylate transporter 1 and/or 4 (MCT1/4) and non-ionic diffusion via lipid membrane and affected K+ secretion through KCNQ-type K+ channels on the apical membrane