In __SP__ , binding of mutant __SP__ __NODE__ protein ( C terminal truncation 866 End N terminal truncation 1 515 ) and 14 3 3 EPSILON [__NODE__] protein is greater than binding of mutant __SP__ __NODE__ protein ( C terminal truncation 517 End N terminal truncation 1 44 ) and 14 3 3 EPSILON [__NODE__] protein .