Examples of new information

I would like some examples of how the process of natural selection and mutations created new information. This must not occur by playing around with gene switching.Preferably this should occur by mutating a protein to gain a new function.Examples must be specific in exactly what gene was mutated, what the gene does, and what it did.

I am not too stingy with the definition of information.I am specifically looking for a novel adaptation that performs a new task through natural selection and mutations. These mutations could for example change the DNA coding for an enzyme, in order for the enzyme to perform another useful function.One can also show mutational adaptations conforming to information theory.
This link shows some mathematics behind information theory.
info-theory.nb

I have no clue, which is why I gave the first definition: Performing some new function not involved with gene switching. That should be a lot easier.

How do you know that this came about by mutation instead of gene switching or from plasmids?

My issue with the example is that I want to make sure that adaptation actually came about by natural selection and mutations, not something else.I not necessarily looking for mutations that make new proteins, I am looking for mutations that make proteins with new functions.I can leave out the information part, and just ask for the above.