2871
In most cell lines, proteins of molecular weight 49 and 44 kDa were found, however two myeloid cell lines expressed only lower molecular weight species of 24 and 22 kDa .
 ( protein: molecular weight species of 24 and 22 kDa, None) , ( protein: molecular weight 49 and 44 kDa, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: molecular weight species of 24 and 22 kDa, None) , ( protein: molecular weight 49 and 44 kDa, None) 