Variant: rs1221638 

    present in Gene: STXBP5
    present in Chromosome: 6
    Position on Chromosome: 147214169
    Alleles of this Variant: G/A

rs1221638 in STXBP5 gene and von Willebrand's factor (lab test) PMID 26486471 2016 Genome-wide association studies identify genetic loci for low von Willebrand factor levels.