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It is widely used inthe enzyme kinetics. Because both the enzyme and the substrate possess specific complementary geometric shapes that fit exactly into one another. If you are just trying to archive a copy of the compiled output, you will be better off loading up the binary files you need into an archive zip, tar, gzip, etc and storing this archive on a file server. The lock and key model means that the substrate must perfectly fit the enzyme, and the enzyme does not change. According to American Heritage Dictionary a substrate is -.


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