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A simple method for estimating global DNA methylation using bisulfite PCR of repetitive DNA elements - http://nar.oxfordjournals.org/cgi/content/full/32/3/e38

Category: Epigenetics and Methylation Protocols: Bisulfite Treatment Methylation Assay Protocol

Yang et al, NAR. 2004. ue to the heavy methylation of repetitive elements, this assay was especially useful in detecting decreases in DNA methylation, and this assay was validated by examining cell lines treated with the methylation inhibitor 5-aza-2'deox - [Read A simple method for estimating global DNA methylation using bisulfite PCR of repetitive DNA elements]

Fractionation of Mitochondria, Lysosomes, Peroxisomes, ER and Golgi in Pre-formed Iodixanol Gradient - http://www.axis-shield.com/densityhome/optiprep/S13.pdf

Category: Cell Organelle Protocols: Subcellular Fractionation Protocols: Mitochondria Isolation Protocols

Generally in iodixanol gradients the density of organelles decreases in the series: peroxisomes, mitochondria, lysosomes, ER, Golgi, although in Dictyostelium discoideum, the lysosomes are denser than the mitochondria. Iodixanol gradients can usually provide satisfactory resolution of all these membrane particles although it may be necessary to modulate either the gradient or centrifugation parameters in order to optimize a particular separation. - [Read Fractionation of Mitochondria, Lysosomes, Peroxisomes, ER and Golgi in Pre-formed Iodixanol Gradient]

Use of PCR to Prepare a Double-Stranded DNA Library Encoding Random Peptides Protocol - http://www.cshprotocols.org/cgi/content/extract/2006/14/pdb.prot4135

Category: DNA Protocols: cDNA Library Protocols: cDNA Library Construction Protocols

PCR is used as a preparative tool for the synthesis of a high-complexity double-stranded DNA library. In the example presented here, a mixture of synthetic oligonucleotides is used to synthesize a random peptide NNK library, where K is either T or G. The exclusion of A and C nucleotides at the third position decreases the occurrence of stop codons but still allows codons for all 20 amino acids. - [Read Use of PCR to Prepare a Double-Stranded DNA Library Encoding Random Peptides Protocol]