2645
Subunit 6 ( S6 ), an integral component of the 26S protease from human erythrocytes , has been studied by SDS-PAGE , peptide mapping and sequence analysis .
 cell type: human erythrocytes; protein: 26S protease; protein: S6; protein: Subunit 6
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: human erythrocytes, 26S protease, S6, Subunit 6 
Answer:
 cell type: human erythrocytes; protein: 26S protease; protein: S6; protein: Subunit 6