Heteronuclear dipolar recoupling experiments without H-1 decoupling based on simple cross polarization are introduced for applications in biological solid-state NMR. It is shown that standard or adiabatic variants of the cross-polarization experiment with irradiation on the low-gamma (e. g., C-13, N-15) spins even at modest spinning frequencies enable efficient band-selective or broadband dipolar recoupling without the need for intense H-1 decoupling. This facilitates experiments on expensive isotope-labelled protein samples for which sample heating by intense H-1 decoupling may lead to sample detoriation. The principle is demonstrated numerically and experimentally on uniformly C-13,N-15-labelled samples of GB1 and fibrils of hIAPP (20-29) from the human islet amyloid labelled on the FGAIL part. (C) 2010 Elsevier B. V. All rights reserved.