The following image is an example of a fingerprinting gel with 12 samples:
Lane 1 is the Stevens control fingerprint.
Lanes 2 – 6 represent five samples from a Stevens bed that is relatively pure.
Lanes 7 – 12 represent samples from a second bed exhibiting a high level of contamination.
The blue line in this graph represents a two year average yield in each of the 17 beds. The red bars represent the number of off-types in each of the 17 beds. Beds with a greater number of “non-Stevens” bands generally were lower yielding.