VDR is a gene that encodes for a protein that acts as a receptor for vitamin D that regulates bone development and calcium absorption. A variant of the gene (rs2228570 FokI polymorphism) is associated with decreased bone mineral density among prepubescent girls of white background.

The hnRNP C1/C2 component of the nuclear vitamin D receptor complex interacts with promoter regions of genes that are responsive to 1,25-dihydroxyvitamin D3 and can induce their transcription. The interaction is controlled by the reciprocal and temporal pattern of on- and off occupancy of the VDRE by the two components, and is affected through chromosomal sites and binding preferences for certain hormones. Microarray studies of human cells indicate that more than 100 genes carry an identifiable VDRE in their promoters. The VDRE is occupied by transcription repressors in the absence of 1,25-dihydroxyvitamin D3. The 1,25-dihydroxyvitamin D3-VDR complex binds to these genes, resulting in the recruitment of hnRNP C1/C2 and other proteins that can compete with the repressors and initiate transcription.

A virtual dataroom (VDR) could be an archive of information and documents that are relevant to legal, business transactions, or procedures. Viewing, downloading and printing are all restricted. It uses a central server and an extranet connection, which is an Internet connection with restricted access to allow controlled access to users at specific times at which users can access the documents and data.

VDRs are most commonly used by investment banks and businesses involved in mergers or acquisitions. They require a secure platform to share information with potential buyers or investors in a manner that is transparent, and the process of due diligence could click to read require huge quantities of data. Life science companies also use VDRs to keep everything from clinical trial results to HIPAA documentation.

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