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We molecularly cloned a new Grb2 family member , named Grf40 , containing the common SH3-SH2-SH3 motif .
 Grb2 family member, SH3-SH2-SH3 motif, Grf40
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:
 Grb2 family member, SH3-SH2-SH3 motif, Grf40