DNAJC5 and infection: However, the typical changes in CSP expression during infection (upregulation of BmCSP3, downregulation of BmCSP1 and BmCSP9) are not restricted to PN (-like) clusters but occur in many of the clusters, including the abundant (undesignated) clusters 0, 1 and 2 (Figs 2-4 and S1 File).