Reactions whose rates affect the yield of at least one species in the DDT (filled circle) or W7 (empty square) models by at least a factor of two, when their rates are individually varied by a factor of ten. The heavy product is plotted against the heavy reactant for all reactions in Table 1. For example, the ²²Ne(α,n)²⁵Mg reaction (variation of which affects yields in both models) would correspond to both an empty square and a filled circle at (x,y) = (22,25) here. (This figure is available is color in electronic form.)