Figure 7
A neutron |Fo| − |Fc| Fourier map around His97 in myoglobin. Note the fact that the C(ɛ1)—H(ɛ1) bond of this imidazole ring has largely been deuterated (blue contours), while the other C—H group of the ring (upper left of the diagram) still has a red (negative) peak corresponding to an undeuterated H atom. |