def _remove_n(self):
        '''Remove terminal Ns from sequencing results.'''
        for i, result in enumerate(self.results):
            largest = max(str(result).split('N'), key=len)
            start = result.locate(largest)[0][0]
            stop = start + len(largest)
            if start != stop:
                self.results[i] = self.results[i][start:stop]
Remove terminal Ns from sequencing results.