What is the % similarity to C7orf38 of the animal whose % identity to C7orf38 is 81?
CREATE TABLE "orthologs" (
  "common_name" text,
  "genus_species" text,
  "ncbi_accession_number" text,
  "length_aa" real,
  "pct_identity_to_c7orf38" real,
  "pct_similarity_to_c7orf38" real
);
SELECT MAX("pct_similarity_to_c7orf38") FROM "orthologs" WHERE "pct_identity_to_c7orf38"=81;