Saturday, November 9, 2013

Why Protein Labeling Is No Easy Task

By Katrina Wheeler


The role of protein labeling plays a key part in biological research and experiments to understand how molecules function. Amino acids make up protein which is an important nutrient for human beings and other living organisms alike. A selected protein may be infused with a binding partner for the process of labeling molecules.

There are a variety of different methods to understand how different areas of the body function. There are fluorescent kits available to test specific areas. The first step is to pick the specific method depending on which area is to be tested.

A label known as biotin is unrivaled in its ability to bind with certain proteins including avidin, streptavidin and Neutravidin. Due to its strong interaction property to non covalent material, its use is popular for detection, purification and immobilization. In enzyme level biotin is smaller in appearance and has the advantage of relative non intervention with its function.

A process known as biotinylation involves the use of biotin in a series of enzyme and chemical phases. Due to the similarity of reagents used, the chemical method is mostly preferred. The labelling process requires the presence of three groups or components known as the biotinyl, spacer arm and reactive group.

Another labeling option is enzyme probes which are supposedly bigger than biotin. The uniqueness of enzymes lies in the fact that certain types have varying degrees of differences in reacting with various components. A longer shelf life and greater versatility increase their protein detection ability in cells and tissues.

Enzyme products for label creation offer a range of choices for chemists for use in a variety of biological research. Additional substrates which are necessary for creating the specific signal also come in different options. Enzyme usage is also unique due to its suitability in complex processes like crosslinking and reductive animation, as well as in antibodies.

Another method that can also be used is the use of fluorescent molecules which react to any source of light giving off a distinct signal. They can perform by themselves without requiring any other reagents in experiments. Their discovery is recognized as a significant advancement in technology in protein purification, vivo processes and detection.

In recent times with the availability of a larger variety of fluorescent probes, their functions have become more versatile. Although they call for more sophisticated equipment, their results in the whole process prove much superior in quality. Due to this reason, fluorescent products make a better choice compared to the other existing techniques.

With advances in molecular labeling technology, additional research is called for to improve on techniques so as to avoid interfering with the normal functioning of the cell. In response chemists have come up with a new technique that involves the attachment of a fluorophore. It is smaller in comparison to the standard fluorescent probes used today and has to be attached to another protein as a mammalian cell.

The results indicated a stable link being created from the reaction between the two components which was hitherto practically impossible. In choosing the method of protein labeling priority needs to be given to the compatibility value. Making the right selection choice may well be the difference between the success and failure of your biological experiment.




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