OPERON LACTOSA Y TRIPTOFANO PDF DOWNLOAD

Operón Lactosa. No description Transcript of Operón Lactosa. Operón Lactosa ¿Qué es la regulación Operón lactosa. Operón Triptófano. Presentación de diapositivas (con narración) sobre los operones lactosa y triptofano. El operón trp no es exprimido si hay triptofano en el medio de cultura. Se ha visto que el operón lac tiene de hecho tres secuencias de tipo operador.


OPERON LACTOSA Y TRIPTOFANO PDF DOWNLOAD

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OPERON LACTOSA Y TRIPTOFANO PDF DOWNLOAD


Para una bacteria hay tres modos de cambiar el ADN: Esta bacteria es capaz de construir un pilus. El cambio de ADN es hecho a traves del pilus.

Operon Lactosa y triptofano 2013

Este virus se comporta como un vector. Sexual reproduction operon lactosa y triptofano an exchange of DNA between two bacterial cells followed by a modification of the DNA of the recipient bacterium.

For a bacterium there are three operon lactosa y triptofano to exchange DNA: DNA enters the cell after a hole had been made through the cell membrane. A similar process in eucariotas is called transfection except in yeast where the process is also called transformation. Transformation is also a method used frequently in the laboratory to introduce experimentally DNA inside bacterias and yeast.

This bacterium is able to build a pilus. The pilus allow the bacterium to communicate with another bacteria which doesn't possess the plasmid such a bacterium is called F.

OPERON LACTOSA Y TRIPTOFANO PDF DOWNLOAD

The exchange of DNA is made through the pilus. If the plasmid is integrated into the bacterial chromosme bacterium HFrthe whole or a part of the chomosome could pass through the pilus sexduction.

The DNA transfer is made from one bacteria to the other operon lactosa y triptofano the help of a virus bacteriophage infection. This virus behave as a vector.

This method is also used with eucaryotes cells. Fue notado que un fago virus bacterial o bacteriofago que parasita a una especie de E.

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La metilasa de tipo II pone un metilo sobre un nucleotido del sitio Adenina o Citosina. Usted tiene que conocerlos. Las enzimas que reconocen estas secuencias tienen una sensibilidad variable en el methylation.

Mbo I es inhibido y Bam HI no. It was noticed that when a phage bacterial virus or bacteriophage which parasites one species of E. The other species produce an endonuclease which cut the DNA operon lactosa y triptofano the phage which was not methylated by a methylase specific of these other bacteria.

Biologia molecular: Enzimas

The restriction process is produced by a couple of enzymes: The methylase and the operon lactosa y triptofano recognize the same site, called the site of restriction. The type II methylase puts a methyl on a nucleotido A or C of the site. This ethylation protects this site: Any foreign DNA, which is introduced inside the bacterium, is cut by the endonuclease, because operon lactosa y triptofano is not methylated at the right place.

Any DNA produced in this bacterium cloning cannot be cut by the endonuclease of the couple. These two conclusions are important in molecular biology. Many bacterium exoress less specific methylases like dam and dcm.