YT epitope YT2 allele always associated with P446P CCC->CCT polymorphism do not alter electrophoretic and catalytic properties of the erythrocyte enzyme (masson) YT2 allele rather low in Georgian Jews (7%) always associated with P446P CCC->CCT polymorphism (Ehrlich)ACHE:c.1057C>A snp ss23142124 high but not full linkage with P446P CCC->CCT polymorphism (Hasin)