The expression levels of 2 other gene products that have been associated with MVID, ie, the STX3- and STXBP2-encoded syntaxin-320, 21, 22 and munc18-222, 23, 24 proteins, respectively, were unaffected by the loss of UNC45A expression (Figure 1G and H). This evidence concerns the gene STXBP2 and microvillus inclusion disease.