Hlw all, I am confuse with the unit of AU. If I have arbitrary unit for channel 1, 2, 3 and 4 for FRET calculation by sensitization method, should I convert it first to others unit ? E.g. I have value for donor channel 1 1500AU and channel 2 250 AU. For acceptor channel 2 380 and channel 4 3800 and for fusion construct channel 1 1250 , channel 2 1150, channel 3- 10 and 4- 3500. So, if I calculate efficiency with these value, I get a high value of efficiency. I am expecting your advice in this regards. Thanks in advance.