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. Author manuscript; available in PMC: 2013 Sep 3.
Published in final edited form as: J Magn Reson. 2012 Apr 26;220:54–61. doi: 10.1016/j.jmr.2012.04.008

Fig. 1.

Fig. 1

Timing diagrams for pulse sequences. (A) The conventional 1H/15N heteronuclear correlation HETCOR [45] pulse sequence. (B) The high-resolution variant of 1H/15N HETCOR for membrane proteins. It uses a modified magic sandwich pulse sequence (MSHOT-PI4) and a single refocusing π pulse during the 1H chemical shift evolution period. Selective magnetization transfer occurs during the “mixing” period using SAMPI4 [25].