title: GSM5216053: RNA-Seq of HEK293 cells expressing GFP-N, replicate 2; Homo sapiens; RNA-Seq
library_construction_protocol: Total RNA was extracted with the Qiagen RNasy Mini kit. 1000 ng per sample was used in the library preparation. To obtain larger insert size (540 nt on average after size selection), Illumina's TruSeq Stranded mRNA sample preparation protocol was modified as follows: 1) fragmentation time and temperature was reduced from 8 minutes at 98 C to 2 minutes at 80 C. Average size distribution prior to library preparation was 232 nt versus 740 nt, respectively; 2) after the final library was generated, the samples were loaded onto a 2% agarose gel (Cat # 1613101, BioRad) and run for 1 hour at 100 V. The libraries were size selected between 400 and 600 bp. Excised gel fragments were purified using the Qiagen MinElute Gel Extraction kit (Cat # 28604, Qiagen). The rest of the protocol was adapted as described in Illumina's TruSeq Stranded mRNA sample preparation guide (Part# 15031047 Rev. E, Illumina).