The transformation rules of DNA sequences and their structural information are detailed as follows: 1) Nucleotides are represented by their respective abbreviation "A", "T", "C", "G"; 2) Sequences begin at the 5' and end at the 3'; 3) "( )" indicates the nucleotides within parentheses are paired, while those outside parentheses are unpaired; 4) "." represents a nick between strands.