A compilation of the pre-mRNA ends of the genes of nuclear encoded mitochondrial 
proteins resulted in a consensus sequence of the type (T/A)NTTNNNNNTTTNAATAAA. 
Nucleotide positions +8, +13, +14, +16 and +17 downstream of the AATAAA sequence 
show also a predominance of nucleotide T. This consensus sequence suggests the 
importance of the immediate surroundings of the cannonical polyadenylation 
signal sequence AATAAA on the efficiency of the cleavage and polyadenylation of 
this specific group of pre-mRNAs.