MEG

Molecules of Equivalent GFP (MEG)

Spherotech yellow fluorescent particles (FP-0852-2) were calibrated to GFP copies per cell as measured by quanitiative western blot.

The data series "Cells" includes samples from four independent chemostat cultures. Each contained MC4100 with a plasmid-based GFP generator: pSB4A3-I7109, pSB4A3-I7107, pSB3K3-I7109 or pSB3K3-I7107, as noted.

Standard curve

[Fluorescence intensity] = 0.0025*[GFP copies/cell]-14.416

R^2 = 0.9684

FP-0852-2 MEG

From the standard curve above, FP-0852-2 beads represent ~370,000 MEG (+/-40%)