title: GSM2417228: xt_xl_st10.5_MethylC-seq; Xenopus tropicalis x Xenopus laevis; Bisulfite-Seq
library_construction_protocol: Embryos were homogenized in 3 volumes STOP buffer (15 mM EDTA, 10 mM Tris-HCl pH7.5, 1% SDS, 0.5 mg/mL proteinase K), after which two phenol:chloroform:isoamylalcohol (PCI, 25:24:1) extractions were performed. DNA was then precipitated in 1/5 volume NH4AC 4M and 3 volumes EtOH and dissolved in 100 uL, treated with RNase and purified by a PCI extraction. The precipitation was done with EtOH and the DNA was resuspended in 50 uL H2O. MethylC-seq library generation was performed as described previously (Ulrich et al., 2015 Nature Protocols). Briefly, the genomic DNA was sonicated to an average size of 200 bp using a Covaris sonicator. Sonicated DNA was then purified and end-repaired, followed by the ligation of methylated Illumina TruSeq sequencing adapters. Library amplification was performed with KAPA HiFi HotStart Uracil+ DNA polymerase (Kapa Biosystems, Woburn, MA), using 6 cycles of amplification.
attributes.tag: GEO Accession
attributes.value: GSM2417228