Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_16849531_2 (protein_identity VARCHAR, length__bp_aa_ VARCHAR)

### Question ###
What is the protein identity with a length of 5304bp/377aa?

### Accurate SQL ###

SELECT protein_identity FROM table_16849531_2 WHERE length__bp_aa_ = "5304bp/377aa"