Structural characterisation and biological activities of a unique type β-d-glucan obtained from Aureobasidium pullulans Abstract A β-D-glucan obtained from Aureobasidium pullulans (AP-FBG) exhibits various biological activities: it exhibits antitumour and antiosteoporotic effects and prevents food allergies. An unambiguous structural characterisation of AP-FBG is still awaited. The biological effects of β-D-glucan are known to