Comparison of two-step strategy with MAVID for the scl data set (a) Conserved block: alignment of the different scl orthologs. The conserved block as identified by BlockSampler - is marked with a boxed area. (b) Visualization of the MAVID alignment of the corresponding region. The dashed line denotes a gap in the alignment. Rn, Rattus norvegicus; Mm, Mus musculus; Pt, Pan troglotydes; Hs, Homo sapiens; Fr, Fugu rubripes.