Table 1.

Allele Frequencies for the Intron 1 CA Repeat in CF Chromosomes^[Note]

	Frequency of
No. ofRepeats	ΔF508(n = 148)	G542X(n = 56)	N1303K(n = 17)
21	.993	1	.941
22	0	0	.059
23	.007	0	0

Note.— Numbers of chromosomes studied appear in parentheses.