Protein targeted: MLDP, or Myocardial Lipid Droplet Protein, also known as OXPAT/PAT-1 and perilipin 5/PLIN5, has a molecular weight of 50,844 (from amino acid sequence data) and an apparent Mr of 52,000 (after SDS-PAGE). MLDP/PLIN5 belongs to the PLIN/PAT family of proteins, coating the surface of cytoplasmic lipid droplets and sharing a homologous domain called PAT. Other PLIN/PAT proteins include adipophilin (ADRP/PLIN2), perilipin (PLIN1), and TIP47 (PLIN3), which are expressed during differentiation-related stages of lipid metabolism. No cross-reactivity occurs with these additional PLIN/PAT proteins. Tissue localization: MLDP/PLIN5 is positively detected in heart and skeletal muscle.