Table 5.

Phylogenetic analysis of 3′ double nucleotide overhangs in naturally occurring miRNAs^a

Occurrence in miR or miR* strands in mature miRNAs
	Total
Sequence of 3′ double nt dangling ends	miR	miR*
5′—G-pur-X	13	69
U—5′
5′—G-pyr-X	8	102
U—5′
5′—U-pur-X 29	29	9
G—5′
5′—U-pyr-X	15	12
G—5′

^aNumber of sequences in the database closed by a wobble base pair with the corresponding 3′ double overhang (total number = 257).