CREATE TABLE table_16849531_2 (ncbi_accession_number__mrna_protein_ VARCHAR2, species VARCHAR2)

What is the NCBI Accession Number of the Homo Sapiens species?
SELECT ncbi_accession_number__mrna_protein_ FROM table_16849531_2 WHERE species = "Homo sapiens"
SELECT "ncbi_accession_number__mrna_protein_" FROM "table_16849531_2" WHERE "Homo sapiens" = "species"