--------------uuaacga a a U g g
ca ug cugcuuuCAUAGUCCACGAUU GGCgagcga c a
|| || ||||||||||||||||||||| ||||||||| |
gu ac GACGAAGGUAUCAGGUGCUAA ccgcuugcu g c
cccaaucguauagaacgguua a C c g c