Physical location of markers on the chromosome 7 RH map. A summary of the physical mapping information about the markers comprising the chromosome 7 RH map (E.A. Stewart, K.B. McKusick, A. Aggarwal, S. Brady, G. diSibio, D. Elam, N. Fang, R. Goold, M. Harris, R. Lee et al., in prep.) is provided in a table on the World Wide Web (see Table2). This electronic supplement also includes detailed explanations about the information contained in the table. Shown here is a small, representative sample from the first portion of that table, which includes the RH-mapped markers present in the YAC contig featured in Figs. 4 and 5.