For the purpose of comparison, AGT in human cerebrospinal fluids (CSF) from various brain tumour patients (n=13, 0.17±0.10μg AGT equivalent ml−1, 0.23±0.12 μg AGT mg−1 protein) and in human plasma (n=12, 226.0±62.3μg AGT equivalent ml−1, 3.23±1.22 μg AGT mg−1 protein) was also measured. Here, AGT is linked to brain neoplasm.