5199
We show that both delta383 and delta99 specifically enhance expression of cat for plasmids containing a human adult globin (HBB) promoter , whereas expression of similar constructs using human fetal (A gamma-) globin (HBG1) or simian virus 40 (SV40) promoters is not enhanced.
 delta383, cat, human adult globin (HBB) promoter, plasmids, delta99
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 delta383, cat, human adult globin (HBB) promoter, plasmids, delta99