There are two options we can suggest for FRET pair of dyes from our catalog list.
*Cyanine3 (donor) and Cyanine5 (acceptor) can be as FRET pair of dyes: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3769523/
We do have different functionalized Cyanine3 and Cyanine5 derivatives:
Cyanine3 - https://www.lumiprobe.com/t/fluorophores/cy3
Sulfo-Cyanine3 - https://www.lumiprobe.com/t/fluorophores/sulfo-cy3
Cyanine5 - https://www.lumiprobe.com/t/fluorophores/cy5
Sulfo-Cyanine5 - https://www.lumiprobe.com/t/fluorophores/sulfo-cy5
*Coumarin 343 (donor) and FAM (acceptor). Coumarin 343 forms a FRET pair with fluorescein, and can harvest blue light energy for the subsequent transfer to other fluorophores: https://www.fasebj.org/doi/abs/10.1096/fasebj.22.1_supplement.1059.3
Below are the derivatives for these products:
Coumarin 343 - https://www.lumiprobe.com/t/fluorophores/coumarin-343
*BDP FL may be quenched by azo quenchers like Dabcyl, and by FRET acceptors like BDP TMR:
TAMRA can be used with FAM as FRET pair.