| ā | DNA coding system | Quartet coding system | Binary coding system | Decimal coding system | Minimum value of and | Maximum value of and | A, G, C, T | 0, 1, 2, 3 | 00, 01, 10, 11 |
| | AGT, TAA, TTT | 013, 300, 333 | 000111, 110000, 111111 | 0 * 16 + 1 * 4 + 3 * 1 = 7 3 * 16 + 0 * 4 + 0 * 1 = 48 3 * 16 + 3 * 4 + 3 * 1 = 63 | 0 | 63 | | GTT, CCA, AGC | 133, 220, 012 | 011111, 101000, 000110 | 1 * 1 + 3 * 1/4 + 3 * 1/16 = 1.9375 2 * 1 + 2 * 1/4 * 0 * 1/16 = 2.5 0 * 1 + 1 * 1/4 + 2 * 1/16 = 0.375 | 0 | 4 |
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