13887
Supernatants from these cultures were assayed for secreted TGF-alpha and TGF-beta1 using TGF -specific ELISAs .
 protein: TGF; protein: TGF-beta1; protein: TGF-alpha
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: TGF, TGF-beta1, TGF-alpha 
Answer:
 protein: TGF; protein: TGF-beta1; protein: TGF-alpha