![]() Peripheral proteins are those that only rest on the inner or outer surface of the membrane bilayer.Strewn throughout the plasma membrane are proteins.Phosphate heads are hydrophilic, and fatty acid tails are hydrophobic, which facilitates this conformation (Fig. The tails of the top layer will intermingle with the tails of the bottom layer, and both heads will face outward towards the intracellular fluid and the extracellular fluid. Phospholipids are composed of a phosphate head attached to two fatty acid tails. The phospholipid bilayer of a gram-negative bacterial cell is like most other phospholipid bilayers, including the ones present in our cells.The plasma membrane consists of a phospholipid bilayer.Encased within its boundaries are the ribosomes, cell nucleus, mitochondria, and more. The plasma membrane surrounds the bacterial cell.Overview of gram-negative bacteria structure We will go over each layer and its specific contents one by one, below. Beyond that is the peptidoglycan cell wall, and lastly we have the outer membrane. Outside of this is the periplasmic space. ![]() ![]() The contents of the cell are contained in the plasma membrane. We will examine these properties of gram-negative bacteria and, by doing so, see the differences that distinguish gram-negative bacteria from gram-positive bacteria. They have certain physical properties, that while invisible to the naked eye, allow them to pick up particular dyes in gram staining, which belie the characteristics of their cell wall and other structures. Gram-negative bacteria are classified as such due to their appearance after a gram stain test.
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