Native collagen I-III type from rabbit skin. Image was obtained in semicontact mode in air.

The sample was kindly given by J. Troshina., Laboratory for a polymer application in cardio-vascular surgery, Bakulev Research Center of Cardio-Vascular Surgery of the Russian Academy of Medical Sciences (RAMS), Moscow, Russia.

Image courtesy of M.Savvateev, NT-MDT, Moscow, Russia.