TABLE 1.

Summary of QCM-D results

Sample	Δf* (Hz)	ΔD* (× 10−6)	ΔD/Δf† (× 10−9 Hz−1)
Ctrl ERα-ERE	39.9	0.56	11.7
E2-ERα-ERE	33.0	0.93	26.5
4OHT-ERα-ERE	19.6	1.63	71.0
Ctrl ERα-non-ERE	9.3	1.36	146.2

^*Δf and ΔD are averaged from normalized signals from overtones 3, 5, and 7 measured from experiments repeated 3–4 times. The experimental variation for Δf and ΔD within each binding step is ∼±15% but similar ΔD/Δf (RSD < 5.0%) were obtained.

^†ΔD/Δf value gives an indication of the dissipation induced per coupled unit mass (31).