KRAS and cancer: Specifically, the mutations occur in the protein sequences of the KRAS or BRAF families, which are responsible for growth, proliferation, differentiation, and apoptosis (Table S1†).63–65 The mutations are implicated in UVA and blue light mediated cancer mutagenesis as well as UVA stimulated light response mechanisms.66–68 Thus, such mutations could result in the specificity observed for blue light-induced cytotoxicity and/or recovery in these cell lines.