tokens: First , human erythroid K562 cells stably integrated with various HS-40 mutants cis linked to a human alpha-globin promoter-growth hormone hybrid gene were analyzed by genomic footprinting and expression analysis .
folded_tokens: first , human erythroid k562 cell stably integrate with various hs-40 mutant ci link to a human alpha-globin promoter-growth hormone hybrid gene be analyze by genomic footprinting and expression analysis .