I have spent the previous 2 years of my 3 year phd program attempting to replicate the results of a previous student in the lab (who was recently awarded her phd for the work). After trying to reproduce her results using her method, using different methods and even going so far as to generate a new transgenic cell line, I CANNOT REPRODUCE any of her results.
Should I include these negative results in my thesis? Has anyone experienced a similar situation before?