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In cells of nonhematopoietic lineage , human endothelial and HeLa cells , the GP Ib alpha promoter activity was no greater than background levels obtained with promoterless constructs .
 protein: GP; DNA: promoterless constructs; DNA: GP Ib alpha promoter; cell type: nonhematopoietic lineage; protein: GP Ib alpha; cell type: HeLa cells; cell type: human endothelial
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: GP; DNA: promoterless constructs; DNA: GP Ib alpha promoter; cell type: nonhematopoietic lineage; protein: GP Ib alpha; cell type: HeLa cells; cell type: human endothelial