Step 1: Recall the purpose of each database.
\[
\begin{aligned}
\text{ExPASy} &\rightarrow \text{Protein analysis tools}
\text{UniProt} &\rightarrow \text{Protein sequence and function database}
\text{InterPro} &\rightarrow \text{Protein families and domains}
\text{GenBank} &\rightarrow \text{Nucleotide sequence database}
\end{aligned}
\]
Step 2: Identify the database not primarily used for protein analysis.
Since GenBank is mainly a repository of nucleotide (DNA/RNA) sequences rather than protein analysis,
\[
\boxed{\text{GenBank}}
\]
is the correct answer.
Therefore,
\[
\boxed{(D)}
\]
is the correct answer.