- Prebiotic cytosine synthesis: a critical analysis and implications for the origin of lifeR Shapiro
Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003, USA
Proc Natl Acad Sci U S A 96:4396-401. 1999..Theories that involve replicators that function without the Watson-Crick pairs, or no replicator at all, remain as viable alternatives...
- A replicator was not involved in the origin of lifeR Shapiro
Department of Chemistry, New York University, NY 10003, USA
IUBMB Life 49:173-6. 2000..The possibility that formation of the first replicator took place through a very improbable event cannot be excluded, but greater attention should be given to metabolism-first theories, which avoid this difficulty...