SELECT MAX("% Identity to C7orf38") FROM table_29149 WHERE "Genus & Species" = 'Mus musculus'
What is the % identity to C7orf38 of the animal whose genus & species is Mus Musculus?
CREATE TABLE table_29149 (
    "Common Name" text,
    "Genus & Species" text,
    "NCBI Accession Number" text,
    "Length (AA)" real,
    "% Identity to C7orf38" real,
    "% Similarity to C7orf38" real
)