In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
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Question:  Primers were developed for specific amplification of 9804 gene fragments .

Answer: 9804 gene fragments


Question:  A selective transcriptional induction system for mammalian cells based on Gal4 - estrogen receptor fusion proteins .

Answer: estrogen receptor


Question:  Tax was demonstrated to interact directly with CREB1 but not with other bZIP proteins , including CREB2 and Jun .

Answer:
bZIP proteins