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Table 2 CYP2D6 and CYP2C19 phenotype prediction

From: Introduction of the AmpliChip CYP450 Test to a South African cohort: a platform comparative prospective cohort study

Estimated metabolic potential of alleles

CYP2D6

Allele activity

Numeric activity

CYP2C19

*1xN, *2xN

Increased

2.0

*17

*1,*2, *22, *33, *35, *43, *45B, *46

Normal

1.0

*1+, *28

*10, *17, *29, *41, *59

Decreased

0.5

*9, *27

*4, *5, *14, *16, *40, *56B, *4xN

Absent

0.0

*2, *3

*25, *30, *64, *65, *73, *74, *84, *85, *86

Unknown

1.0

*15

(Activity according to http://www.cypalleles.ki.se/)

Phenotype prediction

AmpliChip

Prediction

Activity Score (AS)

3 or more functional alleles

UM

> 2.0

1 or 2 functional alleles and increased paired with decreased or absent

EM

1.5-2.0

1 or 2 reduced function alleles

IM

0.5-1.0

2 absent function alleles

PM

0.0

  1. Alleles for both genes present in this table are relevant to this study; additional allele information is available at http://www.cypalleles.ki.se/. The activity of each allele in the genotype is used to predict phenotype. CYP2D6 Activity Score (AS) is assigned according to model A proposed by Gaedigk et al. (2008). The AS was adopted to predict CYP2C19 activity.