When leaves of representative mutants of the other 24 Cer genes with only a modified leaf cer phenotype (Lundqvist and Lundqvist, 1988) were exposed to TB, however, they remained unstained, as did cer.zk85 and .yg1014, appearing to lack wax on all organs (Supplementary Data Fig. S1). Here, CBLN1 is linked to tuberculosis.