In a weighted alphabet, every symbol is assigned a positive real number called a weight. A string formed from a weighted alphabet is called a weighted string, and its weight is equal to the sum of the weights of its symbols.
The standard weight assigned to each member of the 20-symbol amino acid alphabet is the monoisotopic mass of the corresponding amino acid.
Given: A protein string P of length at most 1000 aa.
Return: The total weight of P. Consult the monoisotopic mass table.
SKADYEK
821.392
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