We have a Biacore 3000 from GE Healthcare, which uses Surface Plasmon Resonance technology (SPR) to perform label-free measurements of protein interactions, as well as detect differences in concentrations of solutions.  This technology can determine binding kinetics and protein interactions without the need for additional dyes or labels.  For the longest time I could NOT remember how to pronounce it, so I put together these slides to help me remember (and then went on to carry out the joke ad absurdum…):

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