Nurturing Life Sciences
#Id: 2466
Overall, there are three pillars electrophoresis
Current / voltage
Medium - (buffer/liquid) - with a precise pH value and a constant ionic strength.
Analytes - A compound, which is to be detected or assayed in a given sample.
Electrophoretic resolution mainly can be change by manipulating current and buffer system.
The higher the buffer concentration, the more electric power is applied, resulting in higher heat (joule effect) development.
Smiling Effect, Venetian Blind Effect & Electroendosmosis reduces the efficiency of electrophoresis.
#Id: 2476
#Unit 13. Methods in Biology
Agarose is one of the components of agar, which is a mixture of polysaccharides isolated from certain seaweeds and usually used at concentrations of between 1% and 3% in labs.
#Id: 2477
Agarose gels are formed by suspending dry agarose in aqueous buffer, then boiling the mixture until a clear solution forms.
#Id: 2478
The most commonly used buffer for separating DNA is TRIS-acetate containing EDTA ( TAE) with a typical pH of 8.3 and used to dissolve the matrix (agarose) as well as the running buffer.
#Id: 2479
Separation of RNA, TRIS-borate with EDTA ( TBE) is typically used due to superior buffering capacity (beneficial for long run times).
#Id: 2480
TBE gives superior separation of smaller fragments (< 2 kb) in comparison to TAE and is often used for separation of small RNA molecules such as microRNA.
#Id: 2481
Polyacrylamide Gel are formed by the polymerization of acrylamide monomer in the presence of smaller amounts of N,N′-methylene-bis-acrylamide (normally referred to as ‘ bis-acrylamide’).
