2050
The transcriptional initiation site of RAG1 was localized at A , 26 bp upstream of the putative translational initiation codon , ATG , by the primer extension assay .
 GENE: RAG1
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: RAG1