tokens: Western blot analysis showed a rapid corresponding increase in p21WAF1 / CIP1 protein , whereas protein levels of another member of the cyclin dependent kinase inhibitor family , p27kip1 , were unchanged .
folded_tokens: western blot analysis show a rapid corresponding increase in p21waf1 / cip1 protein , whereas protein level of another member of the cyclin dependent kinase inhibitor family , p27kip1 , be unchanged .