Polylysine and polyglutamate are two examples of synthetic polypeptides which can assume an α-helical structure under appropriate conditions. identify which of these two synthetic polypeptides can form an α-helix at the indicated ph values.

I believe that the answer to the question provided above is the Polylysine , it can assume an α-helical structure under appropriate conditions.  Polyglutamate  can form an α-helix at the indicated ph values.  
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Earth's rotation cause the global convention current between the equator and the poles