Selective-decoupling in 3D experiments

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For ¹³C,¹⁵N-labeled proteins, in some cases it is necessary to use selective ¹³C-decoupling, for instance on the carbonyls or alpha-carbons.

Set the following parameters:

• cpdgrp2=mlev180sp
• power level sp15=pl12
• decoupling pulse length about pcpd2=768us
• spnam15=G3.256
• spoff15 is the ¹³C-offset for selective decoupling.