Rapid resonance assignment is a key requirement in structural genomics research by NMR. In this context we present here two new pulse sequences, namely, HNN-A and HN(C)N-A that have been developed by simple modification of the previously described pulse sequences, HNN and HN(C)N [S.C. Panchal, N.S. Bhavesh, R.V. Hosur, Improved 3D triple resonance experiments, HNN and HN(C)N, for H(N) and 15N sequential correlations in (13C, 15N) labeled proteins: application to unfolded proteins, J. Biomol. NMR, 20 (2001) 135-147]. These increase the number of start/check points in HNN and/or HN(C)N spectra and hence help in pacing up resonance assignment in proteins.
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