code: def _isProtein(self):
          
          last = self.blockCount - 1
          return ((self.tEnd == self.tStarts[last] + 3 * self.blockSizes[last]) \
                  and self.strand == "+") or \
                  ((self.tStart == self.tSize - (self.tStarts[last] + 3 * self.blockSizes[last])\
                  and self.strand == "-"))
docs: check if blockSizes and scores are in the protein space or not