anti-Green Fluorescent Protein (GFP) antibody: Fluorescent proteins (FP) are powerful tools to study protein localization and dynamics in living cells in particular the prominent green fluorescent protein (GFP) from Aequorea victoria. Here we offer a rat monoclonal antibody (MAb) against various GFPs, designated as 3H9. The 3H9 MAb is characterized by high affinity and specificity. It is suitable for immunoblotting and ELISA.With this versatile antibody GFP and fusions thereof become attractive tools for biochemical applications like identification of interacting proteins or Western Blotting.