Catalyzes the oxidation of cytokinins, a family of N(6)- substituted adenine derivatives that are plant hormones, where the substituent is an isopentenyl group (By similarity). OSIGBa0153E02-OSIGBa0093I20.7 Cytokinin dehydrogenase 8 CKX8 MELKAMYLYAAVLAVLLCSSVNFIQSPTDVLGPVALLEPTPSSARDFGAVVSDAPFAVMRPESPDDIALLLGALSSTAPSPRATVAAVGAGHSLHGQAQARDGIVVETRALPRDVHVVSARAHGGDDDATVRAYADVGAGALWVEVLEECLKLGLAPPSWTDYLYLTVGGTLSNGGISGQTFKHGPQISNVLQLEVVTGKGEVVTCSPTEIPELFFAVLGGLGQFGIITRARIPLQLAPPKVRWVRAFYDSFETFTGDQELLVSMPEQVDYVEGFMVLNEQSLHSSSVAFPAQLNFSPDFGSKGRKKVYYCIEFAVHDFQQDSSRADHVVKLVSAKLSYLRPHVYSVEVSYFDFLNRVRMEEESLRSRGLWDVPHPWLNVFVPKHGITQFKGLLMDTVSADDFEGPILVYPLLTDKWDGNTSAVVPAAPDGVMYIFGVLRSTDPARCGRACVDSIMARHRRVADEACRDGGGGGRGIGAKQYLARQPSPARWRDHFGAGWGRFAARKARFDPLHVLGPGQGIFPRTDSAGSM OsI_16693 Cytokinin oxidase 8 CKX8_ORYSI 532