The genomic dna sample was sent to (b)(4) for bi-directional sequencing.Sequencing interrogated kel gene exons 1 to 19 and the homozygous allele genotype kel*k(1216t) was identified.This variant allele was reported by isbt as kel*02n.15 which encodes a null kell phenotype, k0.This kell phenotype is k-, k-, kpa-, kpb-, jsa-, jsb-.Id core xt reported a predicted k+, kpb+ phenotype, but null kel*k(1216t) variant allele, not interrogated by id core xt, is associated with k-, kpb- negative phenotype.The false positive results obtained by id core xt are considered a discrepant result and then a malfunction.This case report is covered by limitations number 1 and 10 of id core xt package insert.
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