HSPD1 and infection: Similarly, other genes of the cell wall stress stimulon including vraX, autolysin encoding genes (ssaA, lytM, amiD2 and isaA), genes involved in cell separation (gpsB and sle1), groEL encoding a chaperonin, and the lipoteichoic acid synthase encoding gene ltaS exhibited greater expression levels in S. aureus during infection of C57BL/6 mice than during infection of A/J mice.