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To determine the E1A domain (s) responsible for these properties several cell lines were created by transforming baby rat kidney (BRK) cells with a set of plasmids expressing different Ad2/Ad12 hybrid E1A gene products .
 baby rat kidney (BRK) cells, E1A domain, Ad2/Ad12 hybrid E1A gene products, plasmids, cell lines
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:
 baby rat kidney (BRK) cells, E1A domain, Ad2/Ad12 hybrid E1A gene products, plasmids, cell lines