Related words. 1  post verb. 2  post up phrasal verb. 3  post off phrasal verb.  cross-post 1  verb. 1. a public notice, especially one advertising a job Synonyms and related words. Types of advertisement:ad, advert, advertisement...  2. a job that someone is sent somewhere to do, usually in another country Synonyms and related words.
Catalytic RNAs, or ribozymes, are a fossil record of the ancient molecular evolution of life on Earth and still provide the essential core of macromolecule synthesis in all life forms today.
A second and completely unexpected lesson of recent years is the fact that ribozymes have found ways to utilise their own side chains directly to do chemistry (Butcher, 2001). Two examples from small catalytic RNAs, the hairpin and hepatitis delta virus (HDV) ribozymes, are shown in Figures 2 and âand3.3.