| 释义 |
Urkingdom A conceptual ‘superkingdom’ lying at the root of the divergence between primitive organisms and bacteria from plants and animals, in which the mother organism, recently graduated from the primordial ooze, had a minimal complement of ‘ur’ genes essential for all organisms, including those genes encoding ribosomal RNA, ribosomal protein, enzymes and proteins required for DNA replication, DNA transcription and RNA translation |