A survey of green plant tRNA 3'-end processing enzyme tRNase Zs, homologs of the candidate prostate cancer susceptibility protein ELAC2

Table 4 The distribution of the trinucleotide sequences immediately after the discriminator nucleotide in chloroplast tRNA genes

Species	⁷⁴CCA⁷⁶	⁷⁴CCN⁷⁶	⁷⁴CNN⁷⁶	Total genes examined	%⁺
Arabidopsis thaliana	0	1	11	37	32
Brachypodium distachyon	1	1	8	38	26
Carica papaya	0	1	8	37	24
Citrus sinensis	2	1	7	37	27
Cucumis sativus	0	1	7	37	22
Eucalyptus grandis	0	1	8	36	25
Glycine max	0	1	9	37	27
Manihot esculenta	0	1	7	37	22
Medicago truncatula	0	0	5	29	17
Oryza sativa japonica	1	2	7	38	26
Populus trichocarpa	0	0	10	37	27
Prunus persica	0	1	8	37	24
Sorghum bicolor	0	2	7	38	24
Vitis vinifera	0	1	8	37	24
Zea mays	1	2	7	37	27

Nucleotide sequences of chloroplast tRNA genes and their 3' flanking regions were obtained from the GenBank genome database http://www.ncbi.nlm.nih.gov/genomes/genlist.cgi?taxid=2759&type=4&name=Eukaryotae%20Organelles, the Chloroplast Genome Database (ChloroplastDB; http://chloroplast.cbio.psu.edu/organism.cgi), and the Organelle Genome Database (GOBASE; http://gobase.bcm.umontreal.ca/searches/gene.php). The discriminator nucleotide was predicted using tRNAscan-SE 1.21 http://lowelab.ucsc.edu/tRNAscan-SE/. ⁺Percentage of chloroplast tRNA genes encoding ⁷⁴CNN⁷⁶, ⁷⁴CCN⁷⁶ and ⁷⁴CCA⁷⁶.

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