Phosphate group

DNA (and RNA) are polymers made up of five-carbon sugars, organic nitrogen-containing bases, and phosphate groups. Examine the view of DNA labeled "phosphate group". Notice a phosphate group is a central phosphorous atom covalently bonded to 4 oxygen atoms. Next, identify the location of the phosphate groups in the overall view of DNA labeled "original". Use the "+" zoom tool to zoom in and get a close look, and then click on "original" to return to the starting view. Where are phosphates located in DNA?