核磁技术和应用范围 Table 1. 1. Different NMR techniques, requirements and approximate limits Technique Labeling Approximate te Approximate size(kDa) Homonuclear 6 10 Heteronuclear Triple-Resonance C 10-12 18-20 Triple-Resonance 18 30 Triple-Resonance ISN/C/H 25-30 TROSY核磁技术和应用范围