MICR 2340 Lecture Notes - Lecture 2: Membrane Transport, Amine, Gram-Negative Bacteria

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13 Sep 2016
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Lecture 2- cell membrane, cell walls and motility continued. The phospholipid bilayer is composed of hydrophilic heads who have a polar group that faces the outside touching the water. Those heads are attached to two hydrophobic fatty acid tails that create the inside with the other hydrophobic tails. This allows water to be inside and outside the cell. Hydrophobic molecules pass through this highly selective barrier by diffusing through the membrane. The hydrophilic molecules must be transported through the membrane via proteins and the proteins form what is called a membrane transport system. Shows the membrane transport system proteins in the bilayer. Proteins are made up of amino acids connected by covalent bonds. Amino acids are composed of an amino group, h"s, an acid/carboxyl group, and an r group. The r group is what is different, it gives the amino acid its specific shape and charge. The molecular interactions occur due to shape/charge of the amino acids.

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