Residues from Lirs corresponding to the conserved internal lipocalin cluster (47).

Residues are grouped into families following their properties, to consider conservation: hydrophobic are I, L, V, A, F, Y, M; hydrophilic are S and N; negatively and positively charged are E, D and R,K respectively; aromatic are F,Y,W, H. T and G are considered apart, and F and Y are either considered as aromatic or hydrophobic, depending on the conserved properties.