Table 1.

Thresholds for classification based on the sequence similarity

Level/interpretation	Improbable member	Inter-family member	Intra-family member
IS element	SeqID < 50%	50% < SeqID $\le$ 70%	70% < SeqID
Tpase/ORF	SeqID < 25%	25% < SeqID $\le$ 45%	45% < SeqID