... crosspeaks were assigned and inte-grated, with concomitant cycles of structure calcula-tions for evaluation of distance and angle constraintviolations as well as assignments of additional peaksbased ... China Sea. Sephadex G-25 was purchased from Amersham Biosciences (Uppsala, Sweden), a ZORBAX300SB-C18 semipreparative column was from Agilent Tech-nologies (Santa Clara, CA, USA), and trifluoroacetic ... 275–283.10 Kuwada M, Teramoto T, Kumagaye KY, Nakajima K,Watanabe T, Kawai T, Kawakami Y, Niidome T,Sawada K, Nishizawa Y et al. (1994) Omega-agatoxin-TK containing D-serine at position 46, but...