Table 1. Typical doses for a macromolecular experiment at a third-generation synchrotron source.

Doses are compared for two proteins using the parameters of two beamlines at Diamond Light Source: I03 and I24 (http://www.diamond.ac.uk/Beamlines/Mx/).

	FcγRIII		ABC transporter
Energy (keV)	12.8	12.8	12.8	12.8
Beam size (µm)	10 × 10	80 × 20	10 × 10	80 × 20
Flux (photons s−1)	1.5 × 1012	1.7 × 1012	1.5 × 1012	1.7 × 1012
Dose rate (MGy s−1)	5.27	0.37	5.50	0.39