19F NMR study of the myosin and tropomyosin binding sites on actin.


Actin was labeled with pentafluorophenyl isothiocyanate at Lys-61. The label was sufficiently small not to affect the rate or extent of actin polymerization unlike the much larger fluorescein 5-isothiocyanate which completely inhibits actin polymerization [Burtnick, L. D. (1984) Biochim. Biophys. Acta 791, 57-62]. Furthermore, the label resonances in the… (More)


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