title: RNA-Seq of mitochondrial:middle leaves of adult Saccharina japonica
design: middle leaves of adult Saccharina japonica were collected, mitochondria were isolated from leaves by using densitygradient centrifugation and digested with DNase I (Promega, Madison, USA) to eliminate genomic DNAcontamination. To obtain a full-length mitogenome sequence, we used both short-read (Illumina) andlong-read sequencing (PacBio Sequel II) technologies in this study