(a)
(b)
Figure 6: (a) 2D [15N-1H] HSQC spectrum of purified full-length hIGFBP-2 (1.0 mM; nondeuterated) recorded at a 1H resonance frequency of 800 MHz at 285 K. (b) TEM images of (hollow) nanotubular structures formed by the C-terminal fragment of human IGFBP-2.