Distribution of TrkC+ neurons and other neuronal subtypes in lumbar DRGs of male Merkel cell-deficient and control mice. A, B, Immunostaining for tdTomato (red), NF200 (green), CGRP (blue), and IB4 (white) in lumbar DRGs from control (A) and K14Cre+;Atoh1fl/fl;TrkCtdtomato (B) mice. Scale bar, 100 µm. C, D, Immunostaining for tdTomato (red) and NeuN (green) in lumbar DRGs from control (C) and K14Cre+;Atoh1fl/fl;Npy2rtdtomato (D) mice. Scale bar, 100 µm. E, F, Quantification of the percentages of NF200+, CGRP+, IB4+ (E), and TrkCtdtomato+ (F) neurons in lumbar DRGs of K14Cre+;Atoh1fl/fl;TrkCtdtomato (n = 6) and control (n = 6) mice. Data are mean ± SEM. Unpaired two-tailed Student's t test. G, Quantification of the percentage of Npy2rtdtomato+ neurons in lumbar DRGs of K14Cre+;Atoh1fl/fl;Npy2rtdtomato (n = 6) and control (n = 8) mice. Data are mean ± SEM. Unpaired two-tailed Student's t test.