(−,+) quadrant of the HYSCORE spectrum of Mo(V) center in the lpH form of CSO in H2 17O buffer. The observed correlation lines are due to the strongly magnetically coupled equatorial 17OH ligand. They are located at A/2 ± νO, where A is the hfi constant and νO is the Zeeman frequency of 17O. Experimental conditions: νmw = 32.02 GHz; B0 = 1.1599 T (near gY); mw pulses, 10, 10, 11(π), and 10 ns; time interval between the first and second mw pulses, τ = 200 ns; temperature, 20 K. Reprinted from [42].