(dT-dG)n.(dC-dA)n 27732-52-1 36641-45-9 5'-Thymidylic acid, 2'-deoxyguanylyl-(5'-3')-, homopolymer, complex with 2'-deoxyadenylyl-(5'-3')-2'-deoxy-5'-cytidylic acid homopolymer (1:1) Poly(dT-dG)n.poly(dC-dA)n