The Expert Committee on Biomaterials and Biotechnology for the European and the North American Region was founded by the General Assembly of UNESCO at its 21st Session, in 1981. The Committee comprises a Coordinating Group and four working Groups, defined in the following scientific areas: Group I Proteins: source, structure and function. Group II Nucl ic acids: the hereditary materials. Group III Im une materials and mechanisms. Membranes and transport in biosystems. Group IV In fulfilment of one of the objectives of the Committee, which have been adopted by the General Assembly of UNESCO in...