Methylation status of CpG sites in partially methylated samples (i–iii) were determined by bisulfite sequencing ()

<p><b>Copyright information:</b></p><p>Taken from "Methylation profiles of genes utilizing newly developed CpG island methylation microarray on colorectal cancer patients"</p><p>Nucleic Acids Research 2005;33(5):e46-e46.</p><p>Published online 10 Mar 2005</p><p>PMCID:PMC1064143.</p><p>© The Author 2005. Published by Oxford University Press. All rights reserved</p> Probes 2–4 cover the 10 CpG sites in these samples. () The methylation levels detected by the oligonucleotide microarray were compared with those derived from bisulfite sequencing. The methylation levels by bisulfite sequencing was determined by dividing the total number of methylated CpG sites analyzed by the number of CpG sites at that locus and multiplying by 100, whereas the percentage of methylation levels analyzed by microarray analysis was determined by the use of standard curves derived from the aforementioned calibration controls as shown in . The average signal intensity was taken from two spots on four slides proceeded in parallel. The error bars indicate SD