University College Cardiff of Cardiff, UK, has received US Patent No. 8,518,641, "DNA damage testing." The patent relates to a method of for detecting DNA damage in a tissue sample. The method includes exposing sample DNA to a tagged DNA-damage binding factor and then shearing the DNA to produce fragments. After separating damaged from undamaged DNA, the two are amplified and differentially labeled. The labeled fragments can be immobilized on a microarray allowing the location and extent of any DNA damage to be determined.