There are currently 1604 mutations listed in this CFTR mutation database.

Statistics by mutation type:

Mutation Type	Count	Frequency %
Missense	667	41.58
Frameshift	258	16.08
Splicing	203	12.66
Nonsense	153	9.54
In frame in/del	32	2.00
Large in/del	45	2.81
Promotor	8	0.50
Sequence variation	236	14.71

Statistics by region:

Region Name	Count	Distribution %	Density %
promotor	16	1.00	n/a
5'UTR and exon 1	29	1.81	15.68
exon 2	29	1.81	26.13
exon 3	46	2.87	42.20
exon 4	109	6.80	50.46
exon 5	28	1.75	31.11
exon 6a	43	2.68	26.22
exon 6b	20	1.25	15.87
exon 7	92	5.74	37.25
exon 8	28	1.75	30.11
exon 9	28	1.75	15.30
exon 10	70	4.36	36.46
exon 11	43	2.68	45.26
exon 12	41	2.56	47.13
exon 13	147	9.16	20.30
exon 14a	32	2.00	24.81
exon 14b	2	0.12	5.26
exon 15	63	3.93	25.10
exon 16	21	1.31	26.25
exon 17a	42	2.62	27.81
exon 17b	82	5.11	35.96
exon 18	30	1.87	29.70
exon 19	57	3.55	22.89
exon 20	51	3.18	32.69
exon 21	32	2.00	35.56
exon 22	29	1.81	16.76
exon 23	26	1.62	24.53
exon 24	20	1.25	9.95
intron 1	4	0.25	n/a
intron 2	22	1.37	n/a
intron 3	18	1.12	n/a
intron 4	12	0.75	n/a
intron 5	8	0.50	n/a
intron 6a	8	0.50	n/a
intron 6b	8	0.50	n/a
intron 7	10	0.62	n/a
intron 8	15	0.94	n/a
intron 9	11	0.69	n/a
intron 10	17	1.06	n/a
intron 11	15	0.94	n/a
intron 12	10	0.62	n/a
intron 13	7	0.44	n/a
intron 14a	11	0.69	n/a
intron 14b	9	0.56	n/a
intron 15	10	0.62	n/a
intron 16	10	0.62	n/a
intron 17a	15	0.94	n/a
intron 17b	12	0.75	n/a
intron 18	9	0.56	n/a
intron 19	11	0.69	n/a
intron 20	17	1.06	n/a
intron 21	7	0.44	n/a
intron 22	2	0.12	n/a
intron 23	10	0.62	n/a
intron 24	4	0.25	n/a

* If you would like to get the mutation list for each type or each region, please choose the "Advanced Text Search" feature in "Search" menu.