The aim of this tender procedure is to contract the production service of a bispecific fusion protein (Duacept) to prevent transplant rejection, under the CAIXAIMPULS 2023 (CI23-20514) and PERIS 2024 (SLT036/24/000043) projects, for the Nephrology and Renal Transplant Group of the Fundació Hospital Universitari Vall Hebron - Institut de Recerca (VHIR). The project leading to these results has received funding and support from the “la Caixa” Foundation under the Grant CI23-20514, and the Subvencions pel finançament de proves de validació (2024-2026) - SLT036/24/000043, funded by la Generalitat de Catalunya – Departament de Salut.