add new test sequence for zdna

CGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGGCGCGCGCGCGCGGCGCGCGCGCGCGCGCGCGCGGCGCGCGCGCGCGCGGCGCGCGCGCGCGCGGCGCGCGCGCGGCGCGCGCGCGGCGCGC