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Literatur
- Fontana W & Schuster P (1998) Continuity in Evolution: On the nature of transitions. Science, 280, 1451-1455. (s. auch dort zitierte Literatur)
- Prusiner SB (1997) Prion diseases and the BSE crisis. Science 278, 245-251.
- Schultes EA &Bartel DP (2000) One sequence, two ribozymes: implications for the emergence of new ribozyme folds. Science 289, 448-452. (s. auch den einführenden Kommentar: Joyce GF (2000) Ribozyme evolution at the crossroads. Science 289, 401-402.)
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