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Table 2 10 most common homozygous HLA-A-B-C-DRB1-DQA1-DQB1-DPB1 haplotypes, level of homozygosity in the MHC region by haplotype and number of blood donors identified among 20,737 blood donors

From: Blood donor biobank and HLA imputation as a resource for HLA homozygous cells for therapeutic and research use

Haplotype

HLA-A

HLA-B

HLA-C

HLA-DRB1

HLA-DQA1

HLA-DQB1

HLA-DPB1

N

Observed frequency

Expected frequency

Heterozygous markers %

1

03:01

35:01

04:01

01:01

01:01

05:01

04:02

71

0.00342

0.00309

0.31

2

01:01

08:01

07:01

03:01

05:01

02:01

01:01

11

0.00053

0.00061

1.70

3

03:01

07:02

07:02

15:01

01:02

06:02

04:01

14

0.00068

0.00058

1.99

4*

02:01

07:02

07:02

15:01

01:02

06:02

04:01

2

0.00010

0.00005

5.85

5*

02:01

13:02

06:02

07:01

02:01

02:02

04:01

7

0.00034

0.00031

1.15

6*

02:01

15:01

03:04

04:01

03:01

03:02

04:01

4

0.00019

0.00024

3.43

7

03:01

07:02

07:02

13:01

01:03

06:03

04:01

2

0.00010

0.00011

0.05

8

02:01

27:05

02:02

08:01

04:01

04:02

03:01

4

0.00019

0.00025

0.82

9* FER

02:01

51:01

15:02

09:01

03:02

03:03

04:02

4

0.00019

0.00012

0.13

10 FER

03:01

15:01

03:03

08:01

04:01

04:02

03:01

4

0.00019

0.00004

0.47

  1. The haplotypes are listed in the same order as in Table 1. The most common homozygous HLA-DPB1 allele in 10 most common HLA-A-B-C-DRB1-DQA1-DQB1-DPB1 homozygotes identified among 20,737 blood donors was taken into consideration. N Number of individuals homozygous for the haplotype. The expected frequency refers to the calculated frequency (haplotype frequency p2) of each homozygote based on haplotype frequencies of Linjama et al. [37]. Heterozygous markers % refers to the average percentage of heterozygous markers found in the MHC region by haplotype. * = homozygosity of all the samples representing the haplotype confirmed by clinical grade HLA typing. FER = haplotype enriched in the Finnish population but rare elsewhere as described in Linjama et al. [30]