Spin effect on TS (left, in black) and the DOS (right, in blue) of the DNA-CG nucleotide base pairs at the (L-phosphate, R-phosphate) charges (-1, 1). The spin state is (a) the singlet, (b) the triplet and (c) the quintet in which the spin up (down) is colored black (red). The truth tables are summarized in Table S3.