*4.6. Amino-Acid Composition and Length Distribution of Linkers*

The length and amino acid composition of each processive linker (Table 1) and all IDPs/IDRs in DisProt [44] were calculated. For classification purposes, we also determined composition in terms of a reduced set of amino acid types (positive/basic: Arg, Lys; negative/acidic: Asp, Glu; polar: Ser, Thr, Cys, Gln, His, Tyr, Asn; hydrophobic: Ala, Val, Met, Trp, Phe, Leu, Ile; and special: Pro, Gly).
