7240
These complexes are coordinately expressed except during replicative senescence , which is characterized by the down-modulation of site beta -but not site alpha -binding activities .
 protein: site alpha; protein: site beta
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: site alpha, site beta 
Answer:
 protein: site alpha; protein: site beta