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In the present study, we examined the ability of PtdIns 3-kinase to initiate the Rac-1 signaling pathways important for T cell activation .
 protein: Rac-1; protein: PtdIns 3-kinase
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: Rac-1, PtdIns 3-kinase 
Answer:
 protein: Rac-1; protein: PtdIns 3-kinase