13369
Expression of the IL-2 gene requires activation of T cells through stimulation of the TCR and costimulation through accessory receptors .
 protein: IL-2; DNA: IL-2 gene; cell type: T cells; protein: accessory receptors; protein: TCR
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: IL-2, IL-2 gene, T cells, accessory receptors, TCR 
Answer:
 protein: IL-2; DNA: IL-2 gene; cell type: T cells; protein: accessory receptors; protein: TCR