Effects of MaxCluster on the ability for an iterative refinement to improve the number of concordant introns. The ΔCDI values before (red filled circles) and after CR-M1-PR iteration (purple filled diamonds), together with the total number of introns before (blue filled squares) and after iteration (green filled triangles), are indicated as a function of MaxCluster. (A) P450s. (B) ribosomal proteins. The wall clock time spent for calculation with 10 CPUs in parallel is also shown by black crosses.