We found no evidence for statistically significant expression gradients of Gcg , Gip , Tph1, Pzp , or Pyy in PPG-cells along the longitudinal axis of the upper small intestine, although Pzp showed a trend of decreasing and Pyy a trend of increasing expression distally ( Figure 3 A).
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Single-cell RNA-sequencing reveals a distinct population of proglucagon-expressing cells specific to the mouse upper small intestine.
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