Atomic force microscopy (AFM) has proved its value not only for resolv
ing the topographical structure of biological samples, but also for pr
obing inherent properties of biological structures, like local interac
tion forces, mechanical properties or dynamics in a natural (physiolog
ical) environment. This minireview focuses on the acquisition of elast
icity data of biomaterials by AFM. A possible theoretical model is pre
sented, followed by a practical 'how to do it with AFM', and, finally,
a brief overview of publications in this field is given, (C) 1998 Fed
eration of European Biochemical Societies.