CREATE TABLE table_21136 ("Species" TEXT, "Species common name" TEXT, "NCBI Accession Number  ( mRNA/Protein ) " TEXT, "Length  ( bp/aa ) " TEXT, "Protein Identity" TEXT)

What is the species with the common name 'mouse'?
SELECT COUNT("Species") FROM table_21136 WHERE "Species common name" = 'Mouse'
SELECT COUNT("Species") FROM "table_21136" WHERE "Species common name" = 'Mouse'