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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Nat Struct Mol Biol. 2009 Jul 20;16(8):883–889. doi: 10.1038/nsmb.1637

Table 1.

Dissociation equilibrium constants (Kd) for GST-UBA domains interacting with polyubiquitins.

GST-UBA K63-Ub2 K48-Ub2 K63-Ub4 K48-Ub4
Ede1 48 ± 9 110 ± 16 6.0 ± 1.9 25
hHR23A UBA1 26 36 4.7 13
Ubc1 130 460 ND ND
DRM2 UBA1 89 140 ND ND

Kd values (μM) were determined by SPR. Measurements with 3 or 4 replicates are presented as (Kd ± standard deviation). ND, not determined.

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