文摘
Detailed electron paramagnetic resonance and electron nuclear double resonance experiments on the co-crystalline complex of 1-methylthymine:9-methyladenine (MTMA) have revealed that the major radiation induced products at low temperatures (10K) are MTMA1, a radical formed by net hydrogen abstraction from the C5 methyl group on thymine, and MTMA2, a radical formed by net hydrogen abstraction of the N1 methyl group on thymine. The following four minor products were also observed: MTMA3, the C4–OH protonated anion of thymine, MTMA4, the C6 H-addition product of thymine, and MTMA5 and MTMA6, radicals formed by net H-addition to C2 and C8 of the adenine base.