Acknowledgements

Dr. Crystal Bolden-Rush for helping with synthesizing PolybHb. Dr. Jim Lee (Dept. of Chemical and Biomolecular Engineering, The Ohio State University) for allowing us to use his dynamic light scattering (DLS) spectrometer. Pengfei Jiang for helping us to run the Tecnai G2 30 TWIN Transmission Electron Microscopse (Campus Microscopy & Imaging Facility, The Ohio State University). This work was supported by NIH grants: R56HL123015, R01HL126945, R01EB021926.