Table 2.

OSRE performance on artificial data set.

Artificial data set A		Artificial data set B
Data	OSRE rule	Data	OSRE rule
10	P2 ∈ {D,E,G,S,W,V}	102	P2 ∈ {P}
			P1 ∈ {R}
102	P1' ∈ {A,I,L,M,F,V}	103	P4 ∉ {S}
			P2 ∈ {P}
			P1 ∈ {R}
103	P1' ∈ {A,I,L,M,F,V}	104	P4 ∉ {R,N,Q,E,K,S}
	P2' ∉ {P}		P3 ∈ {Q}
			P2 ∈ {P}
			P1 ∈ {R}
		105	P4 ∈ {A,G,I,L,M,F,T,V}
			P3 ∈ {A,G,I,L,F,T,V,W}
			P2 ∈ {P}
			P1 ∈ {R}
			P1' ∉ {D,E}

Rules extracted with OSRE from the artificial data sets (cf. Table 1). The left column for each data set shows the number of peptides used to extract the rules.