What does "Origin" mean in NCBI GenBank?
The ORIGIN may be left blank, may appear as &quot;Unreported,&quot; or may give a local pointer to the sequence start, usually involving an experimentally determined restriction cleavage site or the genetic locus (if available). This information is present only in older records.
The sequence data begin on the line immediately below ORIGIN.

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Given that it's left blank in your file, it doesn't signify anything other than the end of the annotation and beginning of the raw sequence.