Table 1.

Binding of High-Confidence EJCs Identifies Low Abundance Exons and Previously Non-annotated Exons

Exon Type	Number of Exons with Signal of BTZ and One Other EJC Protein >1 RPM and RNA-Seq <0.5 RPM	% of All Annotated Exons
altBoth	208	4.8
altDonor	415	3.7
altAcceptor	668	4.0
Variant	935	1.8
Constitutive	2,904	2.3
	Number of Non-annotated Exons with Signal of BTZ >2 RPM and One Other EJC Protein and Canonical Splice Site Donor Motif	Validated
Candidate	32	28 (90%)