- The structure of mouse HP1 suggests a unique mode of single peptide recognition by the shadow chromo domain dimer. Brasher, S.V., Smith, B.O., Fogh, R.H., Nietlispach, D., Thiru, A., Nielsen, P.R., Broadhurst, R.W., Ball, L.J., Murzina, N.V., Laue, E.D. EMBO J. (2000)