compared among total genes and HK genes defined in 18 tissues. The expression breadth distribution of total genes in 51 tissues has two modes representing TS and HK genes respectively, but due to the limited gene detectability in poorly sampled tissues, the spike of HK genes peaks at value 35 and diminishes as tissue broadness increases. The expression breadths of HK genes defined in 18 tissues peak at about value 42 showing very broad expression in 51 tissues.<p><b>Copyright information:</b></p><p>Taken from "How many human genes can be defined as housekeeping with current expression data?"</p><p>http://www.biomedcentral.com/1471-2164/9/172</p><p>BMC Genomics 2008;9():172-172.</p><p>Published online 16 Apr 2008</p><p>PMCID:PMC2396180.</p><p></p
