SLC38A7 and viral infectious disease: In the examination of the expression level of genes encoding other transporters in the midgut after virus infection, a decrease in the expression level was observed in only four of the 26 genes encoding an amino acid transporter (AK380866, +nsd-2), a cation transporter (AK378156 and AK386733), and a phosphate transporter (AK378420) (Figure 5) [26].