Based on the CH322-147E14 BAC genomic clone that contains ~19.5 kb of X chromosome genomic region including ~3.3 kb upstream of the mud mRNA 5' and 5.4 kb downstream of the mud 3' mRNA and thus most of the coding regions of genes proximal and distal to mud locus. The region encoding the putative actin binding calponin homology domain (CH, amino acids 1-246) of mud is deleted.