1975
Fos kinase was shown to be distinct from other identified serine /threonine kinases , including protein kinase A , protein kinase C , casein kinase II , MAP kinases , p70S6K and p90RSK .
 p90RSK, protein kinase C, MAP kinases, serine /threonine kinases, casein kinase II, p70S6K, protein kinase A, Fos kinase
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:
 p90RSK, protein kinase C, MAP kinases, serine /threonine kinases, casein kinase II, p70S6K, protein kinase A, Fos kinase