Erratum Erratum

    Science (New York, N.Y.)
    |March 20, 1987
    PubMed
    概括

    这项研究纠正了关于Agrobacterium vir基因表达的报告中的图2A,澄清了T-DNA边界. 可见的带证实了Agrobacterium tumefaciens介导的转化过程中的特定DNA裂变.

    相关概念视频

    Repressible Operon: trp Operon01:21

    Repressible Operon: trp Operon

    The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
    2.1K
    Proofreading01:43

    Proofreading

    Overview
    61.7K
    Proofreading01:31

    Proofreading

    Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
    Errors During Replication are Corrected by the DNA Polymerase...
    9.3K