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<i>Methanosarcina barkeri</i> - methanotrophic euryarchaeote Archaea
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Image #   850625-17
Name:   Choline crystals
Copyright:   Copyright 1985 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Choline crystals. Choline is B fatty acid primarily involved in the production of neurotransmitters in the brain that regulate mood, appetite, behavior and memory. It is most effective in the phosphatidyl choline form. Studies indicate that it improves cognitive performance. Blood levels of choline decrease during prolonged exercise. Choline is the basic constituent of lecithin that is found in many plants and animal organs and is readily made in the body. It is important as a precursor of acetylcholine, as a methyl donor in various metabolic processes, and in lipid metabolism. The excitatory neurotransmitter acetylcholine is converted into choline and acetic acid by the enzymes acetylcholinesterase. This happens typically in the juncture between a motor nerve cell and a muscle cell. Pseudocholinesterase, the other major form of cholinesterase, is also capable of breaking down acetylcholine. Acetylcholine is synthesized from choline and acetate, a reaction catalyzed by the enzymes acetyl coenzyme A and choline acetyltransferase.
Magnification*: x50
Type: LM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   850625-17 12.01.04 acetylcholine precursor aceytlcholinesterase acetic acid appetite B fatty acid B-fatty acid behavior choline choline acetyltransferase cognitive performance crystal crystals excitatory neurotransmitter excitatory transmitter lecithin lipid metabolism memory mood motor nerve cell muscle cell phosphatidyl choline pseudocholinesterase LM

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