tokens: v-Fos protein , the retroviral counterpart of c-Fos , was not susceptible to degradation targeted by c-Jun .
folded_tokens: v-fos protein , the retroviral counterpart of c-fos , was not susceptible to degradation targeted by c-jun .
labels: B-protein_molecule I-protein_molecule O O O O O B-protein_molecule O O O O O O O O B-protein_molecule O