For example, Shen et al. [120] identified potential ligands of prostate-specific membrane antigen (PSMA) suitable for further development as novel PSMA-targeted peptides by PDT, and the two of the peptide sequences deduced from DNA sequencing of binding phage were SHSFSVGSGDHSPFT and GRFLTGGTGRLLRIS, which may be the basis for further development of peptides for prostate cancer tumor imaging and therapy. This evidence concerns the gene FOLH1 and prostate cancer.