SRR6058582 ERCC_Mix1.fastq ONT_RNA_ERCC_Mix1 loader fastq-load.py SRR6058583 SIRV_E2_ssRNA.fastq.gz ONT_RNA_SIRV_E2 SRR6058584 SIRV_E0_ssRNA.fastq.gz ONT_RNA_SIRV_E0