ACP3 and neoplasm: These antigens include recombinant mouse prostate-acid phosphatase (PAP) (Fong et al, 2001), human PAP (Small et al, 2000), PSA proteins or RNA (Heiser et al, 2002; Barrou et al, 2004), PSMA peptides (Tjoa et al, 1996), allogeneic tumour lysate (Pandha et al, 2004) and RNA amplified from autotumour cells (Heiser et al, 2001).