For me, anything that contains casein, the protein found in milk, is considered a dairy item to be avoided. This includes cow's milk, butter, cheeses, and ice cream. This is not to be confused with lactose intolerance, which is an inability to digest lactose, the sugar found in milk and milk products.
In genetics, gene expression is the most fundamental level at which the genotype gives rise to the phenotype, i.e. observable trait. The genetic code stored in DNA is interpreted by gene expression, and the properties of the expression give rise to the organism's phenotype.deally measurement of expression is done by detecting the final gene product (for many genes this is the protein) however it is often easier to detect one of the precursors, typically mRNA, and infer gene expression level.
The unique colony holding the gene sequence of interest is identified by comparing the main plate with bacterial colonies, the nitro cellulose membrane and the X-ray film. The identified colony carrying gene sequence of interest can then be extracted from the plate and grown as a step to amplify the gene of interest. Using expression vectors in creating cDNA library makes the screening of the cDNA library much easier which is done with the help of specific antibodies.