title: GSM1430428: mRNA-seq MicL-S t4; Escherichia coli; RNA-Seq
library_construction_protocol: Extraction was performed as described in detail previously (Li et al., 2012; Oh et al., 2011). 200 ml of cell culture was rapidly filtered at 37C by passing through a nitrocellulose filter. Cell pellets was were rapidly collected using a pre-warmed metal table crumber, flash frozen in liquid nitrogen, and combined with frozen droplets of lysis buffer. Cells and lysis buffer were pulverized in 10 ml canisters (Retsch) pre-chilled in liquid nitrogen using Qiagen TissueLyser II. Pulverized lysate was thawed on ice and clarified by centrifugation at 4C. Ribosome protected and total mRNA fragments were size selected via gel purification. Fragments were ligated to 5' adenylated DNA oligo. After reverse transcription, the single stranded DNA was circularized, and PCR amplified [Oh et al,. Cell 147, 1295 (2011)]. More details at MS Guo, TB Updegrove, et al, Genes Dev. (2014).