2.4.2.1 purine-nucleoside phosphorylase - 2.4.2.10 orotate phosphoribosyltransferase - 2.4.2.11 nicotinate phosphoribosyltransferase transferred. Now EC 6.3.4.21 2.4.2.12 nicotinamide phosphoribosyltransferase - 2.4.2.13 Recommended Name never specified transferred to EC 2.5.1.6 2.4.2.14 amidophosphoribosyltransferase - 2.4.2.15 guanosine phosphorylase - 2.4.2.16 urate-ribonucleoside phosphorylase - 2.4.2.17 ATP phosphoribosyltransferase - 2.4.2.18 anthranilate phosphoribosyltransferase -