7513
These results suggest that haemoglobin production in UT-7 cells is limited by a deficiency of erythroid-specific aminolaevulinic acid synthase ( ALAS-E ) activity or globin synthesis as a consequence of their immaturity as a multipotential cell line .
 ( protein: ALAS-E, None) , ( cell line: UT-7 cells, None) , ( cell line: multipotential cell line, None) , ( protein: erythroid-specific aminolaevulinic acid synthase, None) , ( protein: erythroid-specific aminolaevulinic acid synthase ( ALAS-E ) activity, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: ALAS-E, None) , ( cell line: UT-7 cells, None) , ( cell line: multipotential cell line, None) , ( protein: erythroid-specific aminolaevulinic acid synthase, None) , ( protein: erythroid-specific aminolaevulinic acid synthase ( ALAS-E ) activity, None) 