In the latter part of his career, from 1983 until his death, Professor Bloch and his colleagues discovered sequence homologies between transfer RNA and the larger ribosomal RNAs. He convincingly argued that these homologies could reflect a common origin that may be traceable to archaic RNA molecules existing more than 3.5 billion years ago, when RNA self-catalysis was more important than it is now. These findings were published in Biosystems and in the Proceedings of the National Academy of Sciences, USA , in 1985. Clearly, Professor David Bloch made a very positive impact at The University of Texas as a researcher, as a teacher, and as a concerned citizen of the Austin community. This memorial resolution was prepared by a special committee consisting of Professors Stanley Roux, Irwin Spear, and Hugh Forrest.
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