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The cDNA segment is flanked by the immunoglobulin gene recombination signal sequences so that the cDNA segment can invert and the human IL - 2R L chain is subsequently expressed under the control of the SV40 promoter .
 GENE: immunoglobulin gene recombination signal sequences; GENE: human IL - 2R L chain; GENE: SV40 promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: immunoglobulin gene recombination signal sequences; GENE: human IL - 2R L chain; GENE: SV40 promoter