By constructing a physical map of the p22 region of human chromosome 1 we have been able to show the relative orientation of four genes; GFI1, NB4S/EVI5, RPL5 and DR1. Analysis of the mouse physical map shows that the murine orthologs of these genes are located on mouse chromosome 5. Through this analysis we have established a new region of synteny between mouse chromosome 5 and human chromosome region 1p22.