2623
An isoform lacking exon 11 destroyed the carboxy-terminal leucin-zipper region and introduced a frame shift creating a novel, proline -rich carboxy terminus .
 exon 11, proline -rich carboxy terminus, carboxy-terminal leucin-zipper region
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:
 exon 11, proline -rich carboxy terminus, carboxy-terminal leucin-zipper region