“…According to earlier experiments [Gupta and Wang, 1976;McKee et al, 1977], thymine and thymidine are the most reactive nucleic acid and nucleosides after sonation of nucleoside solutions. Because the levels of thymidine are important steps in the formation of tubulin and mitotic spindle, one may speculate that this mechanism is responsible for the aneugen activity of ultrasound.…”