KRT14 and ovarian carcinoma: Therefore, in this study, NLS sequence (KKKRK) was introduced into tLyP-1 sequence (CGNKRTR) to synthesize a bifunctional peptide tLyP-1-NLS (sequence C-KKKRK-CGNKRTR-C, named K14), which could enhance the selectivity of the vector to ovarian cancer cells and improve the ability of nuclear delivery, thus increasing the transfection efficiency of DNA.