Table 1.

Relative frequency of different LacZ staining patterns in the fungiform and filiform papillae

	Fungiform papillae		Filiform papillae
	P2 to 1 month	P30 to 1 month	P2 to 1 month	P30 to 1 month
Type 1	4/43	3/24	26/111	29/89
Type 2	12/43	3/24	21/111	15/89
Type 3	16/43	12/24	16/111	12/89
Type 4	10/43	6/24	19/111	7/89
Type 5	1/43	0/24	29/111	26/89

The relative frequency is the number of each type/total number of LacZ⁺ stained fungiform or filiform papillae. Abbreviation: P, postnatal day.