Table 3 Frequency of single-nucleotide mutation and of a combination of 5' deletion and 3' uridylation (-1 + UU) for four miRNA families fromHevea

Family name inArabidopsis	Single-nucleotide modification		-1 + UU modification
	Arabidopsis	Hevea	Arabidopsis	Hevea
AtmiR156	G-A: 14.091%	A-U: 49.382% A-C: 3.571%	yes	no
	G-A: 10.407%	G-A: 2.127%
AtmiR159a	G-A: 8.597%	G-A: 4.166%	no	no
	G-A: 5.882%	G-C: 2.127% G-U: 1.398%
AtmiR164a	G-A: 3.967%	G-A: 7.692%	no	no
AtmiR172a	G-U: 0.599%	G-U: 6.153% A-U: 7.692% C-U: 7.692%	no	no

Sites of post-transcriptional modification identified inArabidopsis[50] were analysed in theHeveasmall RNA dataset. Only sequences present at > 0.5% are listed