You have two choices of DNA loading dye. 1: bromophenol blue or 2: xylene cyanol FF. In TBE buffer, bromophenol blue runs at the same speed as a 370bp DNA fragment while xylene cyanol FF runs at the same speed as a 4160 bp DNA fragment. You have a PCR product which you expect to be 1000bp. Which loading dye would you use to add to your sample and run on the gel?
A) Dye 1 (bromophenol blue)
B) Dye 2 (xylene cyanol FF)
C) Either dye will work
D) Neither dye is suitable