Identifying critical human cells, pathways, and targets for new therapies in acute and chronic kidney diseases. The NIDDK Kidney Precision Medicine Project (KPMP) External link aims to ethically obtain and evaluate human kidney biopsies from participants with Acute Kidney Injury (AKI) or Chronic Kidney Disease (CKD), create a kidney tissue atlas, define disease subgroups, and identify critical cells, pathways, and targets for novel therapies. The project will have four distinct, but highly interactive activities: Recruitment Sites, Tissues Interrogation Sites, a Central Hub and a Kidney Tissue Atlas Coordinating Center. Additional technology development in support of the KPMP will be supported by small business programs.