Table 2. A summary of gene length, exon number, exon length and intron length of the PME, proPME, and PMEI in representative species.

Species	Average Gene Length				Average Exons per Gene				Average Exon Length				Average Intron Lengtha
	PME	proPME	PMEI		PME	proPME	PMEI		PME	proPME	PMEI		PME	proPME
P . patens	2330	2692	-		4.28	3.23	-		273	546	-		666	688
S . moellendorffii	1284	2300	-		4.41	3	-		217	579	-		413	338
A . trichopoda	3159	2860	562		3.73	1.87	1.06		213	658	517		1027	2122
S. bicolor	1794	2917	878		3.35	2.05	1.16		327	872	561		667	2122
O. sativa	2623	3065	938		3.47	1.89	1.12		322	958	559		868	1709
S . lycopersicum	2683	3145	686		4	2.58	1.13		257	665	507		524	612
V. vinifera	2576	3052	960		4.94	2.93	1.33		248	434	562		558	1124
P . trichocarpa	2550	2654	885		4.63	2.25	1.09		228	747	556		454	1355
C. papaya	2600	2896	851		4.74	3.07	1.15		246	349	616		618	691
A. thaliana	1933	2476	817		4.67	2.67	1.25		227	648	470		429	942
Mean Valueb	2353	2805	822		4.22	2.55	1.16		255	645	543		622	1170

^a The intron length of the PMEI genes were not shown because many of them do not have introns.

^b The mean values of the gene length, exon number, exon length and intron length in the 10 species.

Indicated only one PMEI gene was detected in P . patens and S . moellendorffii , and the structural information was not shown here.