5-Hydroxy prostaglandin dehydrogenase blocking peptide ( 15-PGDH (92-105)) is a blocking peptide that corresponds to the amino acids (AGVNNEKNWEKTLQ) located at positions 92-105 of the 15-hydroxy prostaglandin dehydrogenase ( 15-PGDH ) sequence. 5-Hydroxy prostaglandin dehydrogenase blocking peptide can block the formation of protein-antibody complexes during immunohistochemical analysis of 15-PGDH.