Mutation status for HCL rearrangements. IGHV family (A) and gene usage (B) are shown for all rearrangements, with the inset in B showing gene usage in HCLv. Homology to germine classified as less than 95% (black), 95% to 98% (dark gray), more than 98% and less than 100% (light gray), and 100% (white).