PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3141077-6 1988 The K 1/2 for GTP activation of papilloma ODC was approximately 7 x 10(-9) M. When a series of nucleotides was tested, only GTP, the non-hydrolysable analog GTP gamma S, dGTP and GDP were capable of significant activation at 1 microM, while other derivatives including GMP, ATP and CTP were less effective. deoxyguanosine triphosphate 170-174 ornithine decarboxylase, structural 1 Mus musculus 42-45