BIOCHIMICA ET BIOPHYSICA ACTA International Journal of Biochemistry and Biophysics Founded in 1947 by H.G.K. Westenbrink, Managing Editor 1947-1964 © 1990, Elsevier Science Publishers B.V. (Biomedical Division) Printed in The Netherlands This issue is printed on acid-free paper Authors should submit their manuscripts (four copies) for publication in BIOCHIMICA ET BIOPHYSICA ACTA by sending them to one of the Managing Editors: K. van Dam
P. Cohen
L L M . van Deenen P.C. van der Vliet
c / o BBA Editorial Secretariat P.O. Box 1345 1000 BH Amsterdam The Netherlands Fax. + 31 20 5803506
Department of Biochemistry Medical Sciences Institute University of Dundee Dundee, DD1 4HN U.K. Tel. +4438223181 Ext. 4241 Fax. + 44 382 23778 G.K. Radda
Department of Biochemistry University of Oxford South Parks Road Oxford, OX1 3QU U.K. Fax. + 4 4 865 515059
P.L. Dutton E.P. Kennedy
c / o BBA Editorial Secretariat P.O. Box 9123 Brookline MA 02146 U.S.A. Tel. + 1 (617) 277-7919 Fax. + 1 (617) 730-5698
Detailed information for contributors may be found in Biochim. Biophys. Acta 715 (1982) 1-23, also published as the 1982 Edition of the booklet I N F O R M A T I O N F O R CONTRIBUTORS TO BIOCHIMICA ET BIOPHYSICA ACTA which is available free of charge from the BBA Editorial Secretariat, P.O. Box 1345, 1000 BH Amsterdam, The Netherlands.
Subscription information 1990 Protein Structure and Molecular Enzymology, Volumes 1037-1041 (5 volumes in 15 issues), Dfl.1525 (US$ 763.00), including postage, packaging and handling. 1990 BBA full subscription, Volumes 1015-1055 (41 volumes in 117 issues), Dfl.9553 (US$ 4777.00), including postage, packaging and handling. The Dutch guilder price is definitive. The U.S. dollar price is subject to exchange-rate fluctuations and is given only as a guide. Journals are sent by surface delivery to all countries, except the following countries where SAL air delivery (Surface Airlifted Mail) is ensured: U.S.A., Canada, Japan, Australia, New Zealand, P.R. China, India, Israel, South Africa, Malaysia, Singapore, South Korea, Taiwan, Pakistan, Hong Kong, Brazil, Argentina, Mexico and Thailand. Airmail rates for other countries are available on request. Subscription orders can be entered only by calendar year (Jan.-Dec.) and should be sent to Elsevier Science Publishers, Journals Department, P.O. Box 211, 1000 AE Amsterdam, The Netherlands, telex 18582 ESPA NL, or to your usual subscription agent. Claims for missing issues should be made within 3 months of publication, otherwise they cannot be honoured free of charge. The Publisher reserves the right to issue additional volumes during the course of the year. Such volumes will be invoiced before publication and delivered after receipt of payment. In the U.S.A. and Canada: All questions arising after acceptance of a manuscript by the Editors, especially those relating to proofs, publication and reprints, should be directed to the Publisher, Elsevier Science Publishers B.V. (Biomedical Division), P.O. Box 1527, 1000 BM Amsterdam, The Netherlands. For further information concerning this or any other Elsevier Science Publishers journal, contact: Elsevier Science Publishing Co., Inc., Attn: Journal Information Center, 655 Avenue of the Americas, New York, NY 10010, U.S.A. Tel.: (212) 633-3750; Telefax: (212) 633-3990; Telex: 420-643 AEP UI. B B A is c i t e d in: C u r r e n t C o n t e n t s L i f e S c i e n c e s - B i o l o g i c a l A b s t r a c t s - C h e m i c a l A b s t r a c t s Index Chemicus -lndex Medicus - CSA Abstracts - Excerpta Medica (EMBASE)