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Sunlight interacts with a protein in our skin called 7-DHC, and the result is active vitamin D3, the most common winter vitamin deficiency
These enzymes catalyze the conversion of L-arginine to L-citrulline, releasing NO in the process [49]
Typical experimental endpoints include measures of collagen and extracellular matrix protein expression, cell migration rates, cytoskeletal organization, and transcriptional changes in genes related to tissue structure and repair, depending on the model
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