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Various integral proteins have multiple membrane-spanning -helices. Bacteriorhodopsin, a protein found in a photosynthetic bacterium captures the energy from light and uses it to pump protons diagonally the bacterial membrane. Like a numerous other integral proteins, like as the G protein-coupled receptors & the polypeptide chain of bacteriorhodopsin loops backwards, forwards diagonally the lipid bilayer seven times. Each of the seven transmembrane -helices is associated to the next through a short hydrophilic region of the polypeptide chain which is exposed either on the cytosolic or extracellular side of the membrane. Another multiple membrane spanning proteins have from two to up to 14 transmembrane helices. For instance, the anion exchange band 3 protein of
figure: Integral membrane proteins. (a) One membrane-spanning region (e.g. glycophorin); (b) multiple membrane-spanning regions (e.g. bacteriorhodopsin).
The erythrocyte plasma membrane which transports HCO - and Cl- across the membrane loops forwards and backwards across the lipid bilayer up to 14 times.
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If the condition or the post disease as a result of intraradicular infection----> treated conventionally via apex " non-surgical ", ---->Here we have 2 options either coronal
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