ATF6 and Floating-Harbor syndrome: We measured the transcript levels of nine known ER stress responsive genes, ATF6, CHOP, XBP1, HSPA5, HERPUD1, DNAJB11 (ERdj3), DNAJC (p58IPK), EDEM1 and HRD1 in cerebellar cortical tissue of five affected FHs and a control dog.