M. luteus can be found in many places such as the human skin, water, dust, and soil. Micrococcus is generally thought of as harmless bacterium, but there have been rare cases of Micrococcus infections in people with compromised immune systems, as occurs with HIV patients.
Therefore when used in gel electrophoresis, markers effectively provide a logarithmic scale by which to estimate the size of the other fragments (providing the fragment sizes of the marker are known). Protein, DNA, and RNA markers with pre-determined fragment sizes and concentrations are commercially available.
What are the components of a gel electrophoresis chamber? What kinds of macromolecules can you look at with gel electrophoresis? Do you need to use different techniques for the different kinds of macromolecules? How do you visualize the macromolecules in the gel? What are real-life examples of what gel electrophoresis is used for? Bibliography