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. 2014 Nov 6;5:236. doi: 10.3389/fphar.2014.00236

FIGURE 2.

FIGURE 2

Physiological functions of free fatty acid receptors (FFARs). Medium- and long-chain fatty acids derived from dietary fat act as ligands for FFAR1 or FFAR4 (I). Short-chain fatty acids produced by gut microbes from indigestible dietary fiber act as ligands for FFAR3 or FFAR2 (II).