6425
Numerous cellular and biochemical abnormalities in immune regulation have been described in patients with systemic lupus erythematosus ( SLE ), including surface Ag receptor -initiated signaling events and lymphokine production .
 protein: Ag receptor; protein: lymphokine
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: Ag receptor, lymphokine 
Answer:
 protein: Ag receptor; protein: lymphokine