A song in praise of peptide palindromes.

Peptide palindromes are invariably found in all proteins, and long palindromes exceeding 10 residues in length are not rare. They are particularly abundant in DNA-binding proteins such as H1 histone. When a complementary strand of the coding sequence is translatable being free of a chain terminator, a complementary protein encode by it becomes equally abundant in peptide palindromes. The simultaneous musical transformation of both strands of mouse H1 histone variety-1 DNA enable us to appreciate the symmetrical beauty of successive palindromes appearing in both H1 histone and its complementary protein.