(untitled) - Khorana, H G; Agarwal, K L; Büchi, H; Caruthers, M H; Gupta, N K; Kleppe, K; Kumar, A; Ohtsuka, E; Rajbhandary, U L; van de Sande, J H; Sgaramella, V; Terao, T; Weber, H; Yamada, T (J. Mol. Biol., 1972)