Fig. 1. Three-dimensional representation of the ß-barrel structures of human mIL-1 (Graves et al., 1990) and human FGF1 (Lozano et al., 2000). ß-sheet domains are indicated in yellow and are depicted as rotating counter clockwise around the open centers of the structures. The structures were downloaded from the Protein Data Bank of the NCBI (http://www.rcsb.org/pdb/).