Table 1.

Kinetics Analysis of ENG-BMP9 Interaction by BLI

	KD (M)	kon (M−1s−1)	koff (s−1)
ECTO	9.81 × 10−9	2.0 × 105 ± 1.69 × 103	1.98 × 10−3 ± 1.15 × 10−5
OR	2.95 × 10−7	2.95 × 105 ± 8.96 × 103	8.71 × 10−2 ± 9.08 × 10−4
MOR	1.79 × 10−7	3.49 × 105 ± 1.3 × 104	6.22 × 10−2 ± 7.76 × 10−4
OR F282V	NBD
OR S278P	NBD
OR Q270A/I271A	NBD
mMBP	NBD

NBD, no binding detected under the tested experimental conditions. See also Figure S8.