8158
Using 5 ' RACE and reverse transcription - PCR ( RT - PCR ) methodologies , we cloned these sequences from brain and placenta and found this material to be composed of alternatively spliced exons using a previously reported noncoding exon ( 1A ) and a novel 97 - bp noncoding exon ( 1B ) .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None