7810
Western blot analysis revealed two cleavage products of approximately 68 kDa and 45 kDa after induction of apoptosis .
 45 kDa, 68 kDa
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:
 45 kDa, 68 kDa