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.
Biotechnology Index Glossary Principles of Gel Electrophoresis Electrophoresis is a technique used to separate and sometimes purify macromolecules-especially proteins and nucleic acids-that differ in size, charge or conformation.As such, it is one of the most widely-used techniques in biochemistry and molecular biology.n contrast to agarose, polyacrylamide gels are used extensively for separating and characterizing mixtures of proteins. Electrophoresis is a technique used to separate and sometimes purify macromolecules-especially proteins and nucleic acids-that differ in size, charge or conformation.