Table 2.

Basic features of the S. strix introns. Characteristics of 21 introns found in 17 Streblomastix genes analysed. Size and base composition are shown. GC% mRNA shows base composition of the coding sequence (excluding introns).

Protien name	Intron	Size(bp)	%GC(Intron)	%GC(coding)
RPS9	1	57	0.29	0.46
	2	88	0.38
	3	57	0.3
RPL18	1	60	0.25	0.49
RPL21	1	46	0.11	0.37
	2	66	0.09
Cathespin B (1)	1	122	0.16	0.35
Cathespin B (2)	1	63	0.22	0.47
	2	66	0.18
	3	91	0.15
Glutamate Dehydrogenase	1	100	0.36	0.38
Pyruvate phosphate dikinase (1)	1	229	0.21	0.44
UAP56/BAT1	1	105	0.22	0.37
	2	168	0.15
Nuclear transport factor 2	1	56	0.27	0.41
	2	58	0.2
Conserved hypothetical	1	64	0.27	0.44
	2	61	0.31
	3	102	0.23
	4	54	0.3
	5	69	0.22
Average		85	0.23	0.42