3482
Thus, the glucocorticoid -induced membrane perturbation , the possibility to inhibit it by RU 486 , and the inactivity of the structurally related progesterone , refer to relatively specific binding sites for the glucocorticoids in the membrane of erythrocyte ghosts .
 cell type: erythrocyte ghosts; DNA: binding sites
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: erythrocyte ghosts, binding sites 
Answer:
 cell type: erythrocyte ghosts; DNA: binding sites