Geneious Prime prompts me to remove a bad (250bp) peak? December 13, 2023 02:38 Updated This is a known problem with the Genescan 500 ladder where this fragment does not migrate correctly. For more info see this document. Related articles Geneious Prime doesn’t recognise my ladder - how do I fix it? Getting started with microsatellites in Geneious Prime What is the gray area at the start of the traces? What is the Locus Document? Where can I find the manual for the Microsatellites plugin?