This practical exercise has become a classic for demonstrating the action of different restriction enzymes on DNA. The original protocol on which this is based was devised by Greg Freyer and published by Cold Spring Harbor's DNA Learning Center.
ABOUT THIS MODULE
The bacteriophage lambda has double-stranded DNA which is 48 502 base-pairs in length. Different restriction enzymes 'recognise' specific sequences of bases in this DNA and cut it at precise locations. Three different restriction enzymes are provided in this module: BamHI, HindIII and EcoRI. (These enzymes take their rather strange names from the initial letters of the names of the bacteria that roduce them.) After treatment with the individual enzymes, the lambda DNA fragments are separated by size using gel electrophoresis. Once the gel has been 'run', the DNA is stained to reveal distinctive patterns of bands which correspond to fragments of different sizes.
The module contains materials for two complete 'runs' of the lambda protocol, each with eight students or working groups.
YOU WILL ALSO NEED
For a full list of replacement items, including Students' booklets, please refer to the Replacement parts web page. Please note that once you have a Base Unit, the most cost-effective option is probably to buy the Lambda protocol module rather than individual replacement items.
LAMBDA PROTOCOL MODULE
Lambda protocol module .....£121.00 (GBP)
All of the prices on this page are in GBP and do not include Value Added Tax (VAT). This tax applies within the European Union only. Postage and handling must also be paid on orders from outside the United Kingdom. Details of how to order are given on the price list and on the Ordering web page.
DNA Gel electrophoresis
The Lambda protocol
The restriction enzyme EcoRI bound to a length of DNA (blue), looking down the axis of the double helix.