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_35831 ( "RNA Segment (Gene)" real, "Size ( s base pair )" real, "Protein" text, "Molecular weight kDa" text, "Location" text, "Copies per particle" text )

### Question ###
How many copies per particle does the protein nsp2 have?

### Accurate SQL ###

SELECT "Copies per particle" FROM table_35831 WHERE "Protein" = 'nsp2'