1620
The generation of AP-1 complexes , as measured by DNA binding activity , closely parallels morphological differentiation .
 protein: AP-1 complexes
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: AP-1 complexes