Titlebook: Symmetries in Science IV; Biological and Bioph Bruno Gruber,John H. Yopp Book 1990 Plenum Press, New York 1990 Peptide.mechanics.molecule.o

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,Evolutionary Meanings of the Primary and Secondary Structures of the “UR-RNA”, A Primitive Possiblyout protein-encoding informations (Watson .., 1987; Orgel, 1987; Schwartz .., 1987; Cech, 1989a; Joice, 1989). The class I intron of . pre-rRNA, virusoids, viroids, RNA portion (M1 RNA) of ribonuclease P and the delta element of hepatitis B virus are representatives of these catalytic RNAs (See reviews in Cech, 1989b and Diener, 1987a).

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E. Benedetti,B. Di Blasio,A. Lombardi,V. Pavone,C. Pedone

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