Table 1.

FUT2 polymorphisms with known effect on secretor status in different populations. Adapted from [31]. The two most common and investigated in genetic susceptibility studies are highlighted in bold.

Allele	Mutation Type	Phenotype	Population
Se302	Missense	Non-secretor a	Thai, Bangladeshi
Se385	Missense	Weak-secretor	East Asian
Se428	Nonsense	Non-secretor	Caucasian, African, Meso-American, Central Asian
Se571	Nonsense	Non-secretor	Filipino and Samoan
Se628	Nonsense	Non-secretor	Japanese and Chinese
Se658	Nonsense	Non-secretor	Chinese
Se357,480,778	Frameshift	Non-secretor	African
Se849	Nonsense	Non-secretor	Chinese and Filipino
Sedel1	Deletion	Non-secretor	Indian and Bangladeshi
Sedel2	Deletion	Non-secretor	Samoan
Sefus	Fusion	Weak-secretor	Japanese

^a No α1,2-fucosyltransferase activity found in transfected COS7 cells [32].