Fig. 5
MALDI-TOF-MS for exact molecular mass (MM) determination of: aE. coli-derived met-hBMP-2 from GenScript (theoretical MM = 13,036 Da), lyophilized after extensive dialysis against 50 mM acetic acid; b same as in “a”, reconstituted with 20 mM acetic acid as recommended; c CHO-derived hBMP-2 (Infuse®)