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 Phospholipid Bilayer. Cells are encased by. membranes composed of a bilayer of phospholipid. The Lipid Bilayer Is Fluid. Because individual. phospholipid molecules do not bind to one another, the lipid. bilayer of membranes is a fluid. 6.2 Proteins embedded within the plasma membrane.