electrophoresis Flashcards
1
Q
what is electrophoresis used for?
A
separating nucleotides
2
Q
step 1 (casting tray)
A
- glass plate has electrodes at each end (pos at one end, neg at other)
- attached to electric supply
3
Q
step 2 (agarose gel)
A
- masking tape each side of tray
- pour agarose onto glass plate
- left to set/solidify
4
Q
step 3 (wells)
A
- use a comb to push down gel to form wells in the solidified agarose gel
- at negative electrode end
- add buffer to whole gel sheet to control pH which would affect hydrogen bonding
5
Q
step 4 (load wells)
A
- add a dye to the wells to allow DNA to become visible
- DNA is broken into fragments using restriction endonucleases
- add known DNA fragments to each well
6
Q
step 5 (gel plate immersed in charged buffer solution)
A
- connect to power supply
- leave for 30 mins
- smaller fragments move furthest and fastest
7
Q
how do you complete a southern blot?
A