Table 1.

Generating ORFs to test for their involvement in non-coding-RNA metabolism

	Total	Ratio	Percentage
Total ORFs annotated *	6,200†
Known role in RNA metabolism	413	413/6,200	7%
Essential genes	1,050†	1,050/6,200	17%
Essential RNA-metabolism genes	253	253/6,200	4%
Total non-coding-RNA biogenesis	1,332
Previously characterized ORFs	413	413/1,332	31%
Predicted ORFs [11]	919	919/1,332	69%
GO: biological process unknown	578	578/1,332	43%
GO: unrelated function	341	341/1,332	26%
Essential ORFs	525	525/1,332	39%

Overview of the available data used by Peng et al. [11] from the databases. *From the Saccharomyces Genome Database [33]; other numbers and percentages were generated from the supplemental data to [11]. ^†Approximate numbers. GO, gene ontology terms.