© Nova Science Publishers Inc. 2007. The attached file is reproduced here in accordance with the copyright policy of the publisher. Reprinted from Nanoscale Structure and Properties of Microbial Cell Surfaces. Morphology, Mechanical Properties and Manipulation of Living Cells: Atomic Force Microscopy, page 145-173, copyright 2006, Gregory S. Watsona, Jolanta A. Watson and Sverre Myhra.