生物 7.4.1.3 1H-decoupled CT-HNCA HNCA (c) X 02 X H 1 decouple Φ1 3 Φ5 T/2 1 2 T/2 t/2 T/2 T/2 decouple b ①4 ①6 t/2 F1(HD->F3N,t1)->F2(Ca,t2)-> F3N->F1(H,t3) 所用相循环为1-x,-x;2y,y;3=4(x),4y),4(-x),4(-y)中4=16x),16(-x) 5=16(x),16(-x;φ6=2(x),2(-X；ref=2(x,-X,-X,X,-X,X,x,-x),2(-xX,X-X,X,-X,-XX)。此处 1 2x= 2JH HNCA 生物大分子波谱学原理 吴季辉 F1(H) -> F3(N,t1) -> F2(Ca,t2) -> F3(N) -> F1(H,t3)