In this article we will discuss about the unique characteristics of cell membrane of archaea. A unique characteristic of Archaea is the presence of ether linkages in the lipids of their cytoplasmic membranes which distinguishes archaea form eukaryotes and most bacteria. The structure of cytoplasmic membranes of many archaea is a lipid bilayer composed of glycerol diether lipids which is [...]
In this article we will discuss about:- 1. Meaning of Cell Membrane 2. Appearance of Cell Membrane 3. Composition 4. Passive Diffusion or Transport across Cell Membrane. Meaning of Cell Membrane: The term was originally used by Nageli and Cramer (1855) for the membranous covering of the protoplast. The same was named plasma lemma by Plowe (1931). Plasma lemma or [...]
The following points highlight the top three properties of carbohydrates in cell membrane of mammals. 1. The mammalian cell membrane contains about 5 per cent carbohydrates present in glycoproteins and glycolipids. 2. Glycophorin, the major integral membrane glycoprotein of human erythrocytes, consists of 130 amino acid residues and spans the lipid membrane having free polypeptide proteins outside both the external [...]