cyclobutane pyrimidine dimers in single-stranded DNA. Their study showed that VcCry1 from "Vibrio cholerae", X1Cry from "Xenopus laevis", and AtCry3 from "Arabidopsis thaliana" all had photolyase activity on UV irradiated ssDNA in vitro.有些防晒油含有此酵素，宣称可以治癒