855
In the STLV-I -bearing T cell lines , tax1 -related antigen molecules detected by Lt-4 were heterogeneous, having molecular weights in the range of 36-41 kd.
 cell line: STLV-I -bearing T cell lines; protein: tax1 -related antigen molecules; protein: Lt-4; cell line: T cell lines; protein: tax1
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell line: STLV-I -bearing T cell lines; protein: tax1 -related antigen molecules; protein: Lt-4; cell line: T cell lines; protein: tax1