lac operon

Structure of lactose and the products of its cleavage.

Tetrameric LacI binds two operator sequences and induces DNA looping. Two dimeric LacI functional subunits (red+blue and green+orange) each bind a DNA operator sequence (labeled). These two functional subunits are coupled at the tetramerization region (labeled); thus, tetrameric LacI binds two operator sequences. This allows tetrameric LacI to induce DNA looping.

lac operon (lactose operon) is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria. Although glucose is the preferred carbon source for most bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available. Gene regulation of the lac operon was the first genetic regulatory mechanism to be understood clearly, so it has become a foremost example of prokaryotic gene regulation. It is often discussed in introductory molecular and cellular biology classes at universities for this reason.

单词	Lac Operon
释义	Lac Operon 英语例句库 The lac operon is an inducible operon, whereas the trp operon is a repressible operon. 乳糖操纵元是可诱导的操纵元；色氨酸操纵元是可阻遏的操纵元。英语百科 lac operon lac operon (lactose operon) is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria. Although glucose is the preferred carbon source for most bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available. Gene regulation of the lac operon was the first genetic regulatory mechanism to be understood clearly, so it has become a foremost example of prokaryotic gene regulation. It is often discussed in introductory molecular and cellular biology classes at universities for this reason.
随便看	prostaglandin synthesis inhibitors的意思 Prostaglandin synthetase的意思 prostaglandin synthetase inhibitor的意思 prostaglandin synthetic inhibitor的意思 Prostaglandin X的意思 Prostal的意思 Prost, Alain的意思 prostalene的意思 Prostalenum的意思 prostalia的意思 prostalia, pleuralia的意思 Prostalmon F的意思 prostalography的意思 prostalund for thermotherapy of the prostate的意思 prostamide的意思 prostamides的意思 prostane的意思 prostanoic的意思 Prostanoic acid的意思 prostanoic acids的意思 prostanoid的意思 prostanoid的意思 prostanol的意思 Prostant的意思 prostaphlin的意思

Lac Operon

lac operon