Table 1.

Detailed clustering results on Rfam _LowID data set

Rfam ID	Family	Ave. identity	Ave. length	Count	# Clusters	Sensitivity	Specificity
RF00013	6S	45%	180.10	5	1	100%	71.4%
RF00030	RNase_MRP	42%	321.70	18	1	72.2%	100%
RF00009	RNaseP_nuc	45%	312.40	38	2	84.2%	100%
RF00031	SECIS_1	45%	64.50	44	2	95.5%	100%
RF00230	T-box	49%	225.70	40	1	99.8%	97.5%
RF00023	tmRNA	48%	356.60	61	2	90.2%	100%
RF00080	yybp-ykoy	49%	121.80	57	1	91.2%	94.5%

Notes:

Ave. identity: average sequence identity of the ncRNA family.

Count: total number of individual ncRNAs in the family that have been included in the benchmark experiment.

Ave. length: average sequence length of the ncRNA family.

^#Clusters: number of major clusters for the ncRNA family.

Sensitivity: number of clustered ncRNAs over total size of the family.

Specificity: number of ncRNAs of the same family over total size of the cluster.