The proprotein convertase. subtilisin/kexin type 5, or PCSK5, mediates post-translational endoproteolytic processing for several integrin alpha subunits. We identified two silent single-nucleotide polymorphisms (SNPs) in PCSK5, which were found to vary in frequency across ethnic groups. The identification of these amplification primers and SNPs provides tools to investigate PCSK5 for association with inflammatory or vascular phenotypes.