Download presentation
Presentation is loading. Please wait.
Published byAmber Garrison Modified over 9 years ago
2
Gel Electrophoresis gel electrophoresis – moving DNA through a gel medium using an electric current Why can we move DNA with electricity? DNA has a negative charge.
3
negative electrode positive electrode agarose gel
4
Gel Medium The gel medium can be made from: 1. agarose - seaweed extract 2. polyacrylamide - artificial polymer Liquid solutions of either medium are poured into a mould and allowed to set and solidify.
5
Gel Medium The semi-solid provides resistance for DNA movement. Short DNA moves through agarose easily travels further Long DNA requires more effort to move through agarose does not move as far
6
Principles of Gel Electrophoresis http://www.youtube.com/watch?v=6_4AY3lYRgo
7
DNA Visualization DNA cannot be observed in gel coloured dyes mixed with DNA to track distance travelled stain DNA with ethidium bromide (known mutagen) UV light box to see fluorescent DNA bands
8
Ethidium Bromide
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.