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. 2009 Sep 9;284(44):30718–30726. doi: 10.1074/jbc.M109.037812

TABLE 3.

Stoichiometry of BppU·BppL·DARPin complexes

Proteins Theoreticalmolecular weight Molecular weight measuredby MALS/refractometry/SEC Stoichiometry(BppU3-BppL9):DARPins (BppU3-BppL9)/DARPin R1h QELS
Da Da nm
(BppU3-BppL9) 263,640 (9 × 17,970 + 3 × 33,970) 255,000 6.0
(BppU3-BppL9) + DARPin 18 308,025 (263,640 + 3 × 14,795) 291,000 1:3 6.6
(BppU3-BppL9) + DARPin 19 307,971 (263,640 + 3 × 14,777) 289,000 1:3 6.4
(BppU3-BppL9) + DARPin 20 307,788 (263,640 + 3 × 14,716) 285,000 1:3 6.4