Each year Colorado Counties are required to submit to the Division of Property Taxation, the Property Tax Administrator, the State Board of Equalization and the County Board of Equalization (the Board of County Commissioners) an Abstract of Assessment.
Nageli and Cramer in 1855 had already suggested that biological cells are separated from their environment by a membrane possessing special characteristics, and in 1900 Overton performed some simple but classical experiments which proposed that cell membranes were composed of lipids (1).
The results of this experiment were key in the development of the fluid mosaic model of the cell membrane by Singer and Nicolson in 1972. According to this model, biological membranes are composed largely of bare lipid bilayer with proteins penetrating either half way or all the way through the membrane.he results of this experiment were key in the development of the fluid mosaic model of the cell membrane by Singer and Nicolson in 1972. According to this model, biological membranes are composed largely of bare lipid bilayer with proteins penetrating either half way or all the way through the membrane.