7428
Although the mRNA level in liver was only fourfold higher than that in keratinocytes and fibroblasts , the hepatic PCD/DCoH protein level was 20-fold higher than that in normal human epidermal keratinocytes and dermal fibroblasts .
 ( cell type: keratinocytes, None) , ( protein: hepatic PCD/DCoH protein, None) , ( protein: PCD/DCoH, None) , ( cell type: fibroblasts, None) , ( cell type: normal human epidermal keratinocytes, None) , ( cell type: dermal fibroblasts, None) , ( cell type: fibroblasts, 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:
 ( cell type: keratinocytes, None) , ( protein: hepatic PCD/DCoH protein, None) , ( protein: PCD/DCoH, None) , ( cell type: fibroblasts, None) , ( cell type: normal human epidermal keratinocytes, None) , ( cell type: dermal fibroblasts, None) , ( cell type: fibroblasts, None) 