摘要
Since the central dogma of molecular biology was proposed by Francis Crick in 1956, many fundamental discoveries have been made to strengthen or expand the theory for gene expression. Nowadays, we know that genetic information flow in a cell is a far more complicated process than the original succinct but explicit version. We now know that besides DNA duplication, DNA to RNA transcription, RNA to protein translation, there are also RNA to DNA transcrip- tion （reverse transcription）, RNA to RNA replication, and RNA splicing and processing between the transcription and translation steps.
Since the central dogma of molecular biology was proposed by Francis Crick in 1956,many fundamental discoveries have been made to strengthen or expand the theory for gene expression.Nowadays,we know that genetic information flow in a cell is a far more complicated process than the original succinct but explicit version.We now know
