The ALlele FREquency Database    ALFRED is a resource of gene frequency data on human populations supported by the U. S. National Science Foundation.

Polymorphism Information

Frequency on Map:    

Allelic designation of the simple (TCTT)_n repeat structure was presented by Mills et al (1993).

The nomenclature used for allele designation of the complex variable structure (TTTC)_3-4 TTTT TTCT (CTTT)_n CTCC (TTCC)₂ is based on Barber et al (1996), and has been augmented by Lazaruk et al (2001).
Alleles:

Allele Name	Allele Symbol	Description
10	10
13	13
14	14
14.3	14.3
15	15
16	16
16.1	16.1
16.2	16.2
17	17
17.2	17.2
18	18
18.2	18.2
19	19
19.2	19.2
20	20
20.2	20.2
20.4	20.4
21	21
21.1	21.1
21.2	21.2
22	22
22.2	22.2
22.3	22.3
23	23
23.2	23.2
23.3	23.3
24	24
24.1	24.1
24.2	24.2
24.3	24.3
25	25
25.1	25.1
25.2	25.2
25.3	25.3
26	26
26.1	26.1
26.2	26.2
27	27
27.1	27.1
27.2	27.2
28	28
28.2	28.2
29	29
29.2	29.2
30	30
30.2	30.2
31	31
31.2	31.2
32	32
33	33
33.2	33.2
34.2	34.2
42.2	42.2
43.2	43.2
44.2	44.2
45.2	45.2
9	9
<18	<18
>30	>30
>31.2	>31.2

References:
- Barber MD, McKeown BJ, Parkin BH. "Structural variation in the alleles of a short tandem repeat system at the human alpha fibrinogen locus". Int. J. Legal Med. 108:180-5. (1996) Online citation.

- Lazaruk K, Wallin J, Holt C, Nguyen T, Walsh PS. "Sequence variation in humans and other primates at six short tandem repeat loci used in forensic identity testing". Forensic Sci Int. 119:1-10. (2001) Online citation.

- Mills KA, Even D, Murray JC. "Tetranucleotide repeat polymorphism at the human alpha fibrinogen locus (FGA) ". Hum Mol Genet. 1:779.. (1992) Online citation.

© 2012 Kenneth K Kidd, Yale University. All rights reserved. The full Copyright Notification is also available.
Originally prototyped by Michael Osier with the aid of Kei Cheung
Upgrades and maintenance since 2002 by Haseena Rajeevan