1191
A single 1 . 8 - kb transcript mRNA was detected by Northern ( RNA ) blot analysis , and its 5 ' end maps to a position 51 bp upstream from the site of initiation of protein synthesis .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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