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Alignment error probability 
in the seed regions. (a) Contour plot of 
for 5S rRNAs. Darker shade corresponds to higher 
and lighter shade corresponds to lower 
. The misalignment probability 
on the level curves are shown on top of the contours. (b) Misalignment probability for 5S rRNAs with different percentage identities. (c) Contour plot of 
for tRNAs. (d) Misalignment probability for tRNAs with different percentage identities.rRNArRNAtRNAtRNA
