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We found nuclear p62c-fos , p39c-jun , and AP-1 binding activity throughout the cell cycle both in HL60 cells and in PHA -stimulated PBL , and we postulate that these proteins are required throughout the cell cycle and not transiently in the G0 to G1 transition as previous mRNA studies have indicated.
 PHA, p39c-jun, PHA -stimulated PBL, p62c-fos, AP-1, HL60 cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 PHA, p39c-jun, PHA -stimulated PBL, p62c-fos, AP-1, HL60 cells