Cover image

Cover A maize B centromere is extended as a single and contiguous DNA fiber. Red fluorescence on the DNA fiber is derived from the ZmB repeat that is specific to the B centromere. Green fluorescence on the DNA fiber is derived from methylated cytosine. White fluorescence is derived from two centromeric repeats, CentC and CRM, associated with maize centromeres. Only red fluorescence, but not white fluorescence, overlaps with green fluorescence, demonstrating a distinct differential methylation pattern of different repeats within the B centromere. (Cover illustration by Dal-Hoe Koo and Jiming Jiang. [For details, see Koo et al., pp. 908–914.])