Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_16849531_2 (ncbi_accession_number__mrna_protein_ VARCHAR, length__bp_aa_ VARCHAR)
### Question:
What is the NCBI Accession Number for the length of 5304bp/377aa?
### Answer:
SELECT ncbi_accession_number__mrna_protein_ FROM table_16849531_2 WHERE length__bp_aa_ = "5304bp/377aa"