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One of the peptides that can be recovered after gluten digestion is 33 residues long; 13 of the 33 residues are proline. How many times would you expect proline to appear in this peptide if it were made up of a completely random assortment of the 20 most common amino acids?

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nicorojascalvo

Answer:

It's expected that proline would appear between once or twice.

Step-by-step explanation:

If it were made up of a random assortment of amino acids, each amino acid can have:

[tex]\frac{1}{20}[/tex] chance of being in any particular place in the sequence.

Therefore, Proline has a [tex]\frac{1}{20}[/tex] chance of being in each place.

We've got 33 places,

So if we can multiply the places we've got times the chances and we get:

[tex]33*\frac{1}{20} = \frac{33}{20}[/tex] or 1.65

Therefore it's expected that proline would appear between once or twice.

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