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Table 1 Comparison of fungiform and circumvallate taste buds in TRPM5-GFP mice.

From: Amiloride-sensitive channels in type I fungiform taste cells in mouse

  Bud diameter (μm) Section thickness (μm) Number of GFP cells Number of PLCβ2 cells Number of SNAP25 cells
Fungiform taste buds 40.1 ± 4.2 (n = 18) 12.8 ± 5.6 (n = 40) 2.8 ± 1.3 (n = 40) 4.2 ± 1.9 (n = 20) 1.6 ± 1.1 (n = 20)
Circumvallate taste buds 43.3 ± 7.4 (n = 29) 14.2 ± 6.0 (n = 38) 7.5 ± 2.7 (n = 42) 6.0 ± 1.9 (n = 20) 4.4 ± 1.8 (n = 22)
  1. The diameter of the taste buds was similar in fungiform and circumvallate taste buds, indicating similar numbers of cells in each type of taste bud. However, the number of GFP-positive cells, SNAP-25-ir and PLCβ2-ir cells was significantly higher in the circumvallate taste buds than in the fungiform taste buds (Student's t test; p < 0.01; df = 80 for GFP, df = 40 for SNAP-25 and df = 38 for PLCβ2). Note that in the fungiform taste buds, the PLCβ2-ir cells are significantly more numerous than the TRPM5-GFP cells (Student's t test; p < 0.01; df = 19).