Minimal consensus regions of monoallelic and biallelic del(13)(q14). Raw log2 ratio (chromosome 13; samples from case numbers CLL275up, CLL347up, CLL213, and CLL321) blotted to the UCSC genome browser (hg18). The minimal monoallelic (A) deleted region encompasses DLEU1 and the first exons of DLEU2, but not the 2 miRNAs, whereas the minimal biallelic (B) deleted region encompasses only DLEU1.