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GATE2020: 47

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The amino acid sequence of a peptide is $Phe-Leu-lle-Met-Ser-Leu$. The number of codons that encode the amino acids present in this peptide is given below:

Phe: $2$ codons

Leu: $6$ codons

Ile: $3$ codons

Met: $1$ codon

Ser: $4$ codons

The number of unique $DNA$ sequences that can encode this peptide is ___________.
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