In an effort to improve rigor and reproducibility, the National Cancer Institute (NCI) Antibody Characterization Program requests cancer-related protein targets for monoclonal antibody production and distribution to the scientific community. The program from The Office of Cancer Clinical Proteomics Research provides well-characterized reagents and other critical resources that support protein and/or peptide measurements and analysis. Requests will be reviewed and considered for merit based on their justification and contribution to existing NCI-funded projects. Priority will be given to projects applying the antibodies to proteomics research. Submissions will be accepted through August 15, 2018. Successful applicants will be notified on or before September 15, 2018. All materials such as proteins and/or peptides must be ready and available when a request is submitted. Please visit the NCI Antibody Data Portal to apply online and for further information.