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Hi there.
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Welcome and thanks for joining me today in a video and question about the start codon in protein synthesis or sometimes what we call translation, which occurs in the ribosomes in the cytoplasma of a cell.
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And this question is asking, why is methionine or mat met for short, always the first amino acid in every protein and pretty much every living thing and every living thing.
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Well, the reason for this is it's the universal start codon.
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Think of that start code.
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So i have a diagram below here to illustrate that.
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So if we bring in messenger, rna, messenger rna is made in the nucleus and leaves the nucleus to go to the ribosome, it carries the code for a specific protein made of amino acids.
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So what will happen is that messenger rna will go to the ribosome.
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I have the ribosome shown below as a big red circle.
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And that's where the messenger rna meets up with the transfer rna, the t rna, which i have in blue.
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It has a complementary code called an antichodon...