Fig. 5. Sequence alignments of SCF from human, mouse, rat and dog (Anderson et al., 1990; Huang et al., 1990; Martin et al., 1990; Shull et al., 1992). The residues that are conserved in human and dog but different from rat and mouse are shadowed in yellow. Five regions of divergent sequence are identified (Roman numerals). Dots denote gaps, and dashes indicate residues identical to the human residues.