Block of cells computed in each iteration. In each iteration of the inner loop blocks of eight cells in the alignment matrices computed. The H, E, F and S values are updated for each cell. The computations start in the upper left cell, proceed right three times and then continue from the left on the second row.
Rognes BMC Bioinformatics 2011 12:221 doi:10.1186/1471-2105-12-221