10 20 30 40 50 GCACGUUCAUUUUGAAUC--| A G A UA U G UGGAACA GGUCU AC UA CUCGUG ACAGU CU AAGCC \ UCGGA UG AU GGGCAC UGUCA GA UUUGG U UUUUUUAGUACUACAAACGU^ G A C CC - A AGCAGUU . 110 100 90 80 70