Title: HNHA-coupl Description: It's a 3D heteronuclear (1H-15N-1H) shift correlation double resonance experiment to measure the 3J(HN-HA) coupling constants from the ratio of NH-NH-diagonal peak to NH-HA-cross peak intensities. These peaks appear separated by their 15N frequency with opposite signs. Spectrometer: Varian Unity Plus 600 MHz Pulse sequence: hnhacoupl.c Literature reference: Vuister, G. W. & Bax, A.; J. Am. Chem. Soc. 1993, 115, 7772-7777 BMRB Pulse Sequence Accession Number: 43 Authors: Sonja Dames Ronald Wiltscheck Biozentrum, University of Basel Klingelbergstr. 70 CH-4056 Basel e-mail: dames@ubaclu.unibas.ch wiltscheck@ubaclu.unibas.ch www home page: http://nmr.bioz.unibas.ch phone: ++41-61/267-2091 fax: ++41-61/267-2190 Parameters: hnhacoupl.par.tar (Unix Tape Archive)