TABLE 1.

Exon-intron structures of ACT, Tri r2, and Tri r4 of T. rubrum^a

Sequence	5′ Boundary	Lariat intermediate	3′ Boundary
Fungal consensus	GTAHG	CTRAC	YAG
ACT intron 1	GTATG	CTAAC	TAG
ACT intron 2	GTGAG	CTGAC	CAG
ACT intron 3	GTAAG	CTGAC	CAG
ACT intron 4	GTAGG	CTAAC	CAG
ACT intron 5	GTATG	CTAAC	TAG
Tri r2 intron 1	GTATA	CTAAC	TAG
Tri r2 intron 2	GTAAG	CTAAT	TAG
Tri r2 intron 3	GTAAG	CTAAC	TAG
Tri r4 intron 1	GTAAG	TTGAC	CAG
Tri r4 intron 2	GTAAG	CTGAC	TAG
Tri r4 intron 3	GTGAG	CTTAC	CAG
Tri r4 intron 4	GTAAG	CTAAC	TAG

^aH is A, C, or T; Y is C or T; and R is A or G according to the International Union of Biochemistry and Molecular Biology codes. Adenosines at the branch site conserved among the filamental fungi are underlined.