Fraction change in the five reaction types defined in Sect. 3.2. The parameters and initial molecules used are shown in Sect. 3.1. Reaction types 1, 2, 3, 4, and 5 are represented by the magenta solid, green solid, light-blue dashed, orange dash-dotted, and red dotted lines, respectively. The red shaded region corresponds to the UV phase. The bottom figure is a stretched view of up to step 50. The horizontal scales are different between the UV phase and the post-UV phase for visual convenience.