JOURNAL OF BACTERIOLOGY

VOLUME 137 0 NUMBER 2 * FEBRUARY 1979 EDITORIAL BOARD Simon Silver, Editor-in-Chief (1982) Washington University. St. Louis. Mo. Stanley C. Holt, Editor (1982) Donald P. Nierlich, Editor (1982) Universityj of Massachusetts, A mherst University of California, Los Angeles Editor (1980) Sam Kaplan, Editor (1983) Allen T. Phillips, Urbana Pennsylvania State Universitv, UniversitY of Illinois, University Park, Pa. Elizabeth McFall, Editor (1980) Howard V. Rickenberg, Editor (1983) New York University, New York, N. Y. National Jewish Hospital, Denver, CO Mark Achtman (1979) Patrick R. Dugan (1980) Hiroshi Nikaido (1981) James N. Adams (1979) A. Eisenstark (1979) John H. Nordin (1979) Nina Agabian (1980) Alan D. Elbein (1979) Michio Oishi (1980) James Akagi (1979) David P. Fan (1981) Sunil Palchaudhuri (1979) David Apirion (1979) Walton L. Fangman (1981) Leo Parks (1979) Arthur 1. Aronson (1979) W. R. Finnerty (1979) Martin Pato (1981) Gad Avigad (1980) John D. Foulds (1979) Wilijam S. Reznikoff (1979) Stephen D. Barbour (1979) Bijan K. Ghosh (1981) Palmer Rogers (1981) Jeffrey M. Becker (1980) Harry E. Gilleland, Jr. (1979) Antonio H. Romano (1979) Claire M. Berg (1980) Helen Greer (1980) Barry P. Rosen (1980) Douglas E. Berg (1980) Walter R. Guild (1981) Robert Rownd (1980) Richard S. Berk (1980) Tadayo Hashimoto (1979) Harold L. Sadoff (1980) Harriet Bernheimer (1980) Gerald L. Hazelbauer (1981) Milton H. Saier, Jr. (1979) Dale C. Birdsell (1981) Joy Hochstadt (1980) Gene A. Scarborough (1979) Edwin Boatman (1980) Bruce Holloway (1979) Irwin H. Segel (1979) Winfried Boos (1979) Philip Hylemon (1979) Jane K. Setlow (1981) H. D. Braymer (1979) Joseph Inselburg (1981) J. A. Shapiro (1979) Jean Brenchley (1980) Robert J. Kadner (1979) David Sherratt (1980) George H. BrowneU (1980) Donald L. Keister (1980) Douglas W. Smith (1980) Richard 0. Burns (1980) David E. Kennell (1980) Issar Smith (1981) A. M. Chakrabarty (1980) Bruce C. Kline (1980) Dieter G. SoU (1979) Peter J. Chapman (1979) Thomas G. Lessie (1979) A. L. Sonenshein (1980) G. William Claus (1979) K. Brooks Low (1979) Dwight Stinnett (1979) Don B. Clewell (1980) P. T. Magee (1980) Stanley Streicher (1980) Stanley N. Cohen (1979) Manley Mandel (1981) John L. Swanson (1981) John W. Costerton (1980) Robert E. Marquis (1979) Robert L. Switzer (1979) John E. Cronan, Jr. (1980) Barry Marrs (1981) Bonnie M. Tyler (1981) Lolita Daneo-Moore (1981) Neil H. Mendelson (1981) James A. Wechsler (1981) Dana L. Diedrich (1980) Sally Ann Meyer (1981) David White (1980) Walter J. Dobrogosz (1979) Gene E. Michaels (1980) Clifford A. Woolfolk (1979) Walter G. Niehaus, Jr. (1981) Howard Zalkin (1979)

Robert A. Day, Managing Editor Gisella Pollock, Assistant Managing Editor Linda Illig, Production Editor 1913 1 St., N. W, Washington, D. C. 20006 EX OFFIC Edwin H. Lennette, President (1978-1979) Willis A. Wood, President-Elect (1978-1979) J. Mehsen Joseph, Secretary Brinton M. Miller, Treasurer The Journal of Bacteriology (ISSN 0021-9193), a publication Made in the United States of America. of the American Society for Microbiology, 1913 1 St., N.W., Copyright C 1979, American Society for Microbiology. Washington, D.C. 20006, is devoted to the advancement and All Rights Reserved. dissemination of fundamental knowledge concerning bacteria and other microorganisms. Instructions to Authors are published in the January issue each year. The Journal is published monthly, and the twelve numbers are divided into four volumes per year. The code at the top of the first page of an article in this journal The nonmember subscription price is $115 per year. Single copies indicates the copyright owner's consent that copies of the article are $10. The member subscription price is $22 per year. Corre- may be made for personal use, or for personal use of specific spondence relating to subscriptions, reprints, defective copies, clients. This consent is given on the condition, however, that the availability of back issues, lost or late proofs, disposition of copier pay the stated per-copy fee through the Copyright Clear- submitted manuscripts, and general editorial matters should be ance Center, Inc., P.O. Box 765, Schenectady, New York 12301, directed to the ASM Publications Office, 1913 I St., N.W., for copying beyond that permitted by Sections 107 or 108 of the Washington, D.C. 20006 (area 202 833-9680). U.S. Copyright Law. This consent does not extend to other kinds of copying, such as copying for general distribution, for advertis- Second class postage paid at Washington, D.C. 20006, and at ing or promotional purposes, for creating new collective works, additional mailing offices. or for resale. Author Index Abdelal, Ahmed T., 1040 Guild, Walter R., 735 Rolfe, B. G., 1020 Abramov, Z. T., 1017 Guzik, Howard J., 900 Ron, Eliora Z., 790 Al-Sowaygh, Ibrahim A., 1022 Rosenberg, H., 705 Aono, Rikizo, 839 Hanus, Frank J., 824 Rupert, Claud S., 740 Arnon, Daniel I., 779 Hastings, J. W., 854 Ryter, Antoinette, 947 Holmans, Priscilla L., 977 Baratova, L. A., 1017 Holmes, W. Michael, 956 Satta, G., 727 Belsole, Donna M., 900 Hornemann, Ulfert, 916 Schafer, Dorothy, 925 Belyanova, L. P., 1017 Hurt, Myra A., 1028 Schlegel, Hans G., 811 Bender, Robert A., 1000 Hylemon, Philip B., 956 Scott, Randolph H., 719 Boquet, Paul L., 1013 Senior, A. E., 711 Brody, Stuart, 912 Jones, Theodore H. D., 752 Setlow, Peter, 1024 Brookman, J. J., 705 Shaginyan, K. A., 1017 Botta, G., 727 Kahane, Itzhak, 764 Shapiro, Bennett M., 1043 Kanazawa, Hiroshi, 818 Shibl, Atef M., 1022 Calame, Kathryn L., 990 Kane, James F., 1028 Shockman, Gerald D., 869 Calavan, E. C., 1056 Kessler, Robert E., 869 Singh, Ravendra P., 1024 Canepari, P., 727 Kilner, Jan, 1031 Skotnicki, Mary L., 1020 Carithers, Robert P., 779 Kline, Bruce C., 885 Smith, Deborah K., 963 Clegg, Steven, 1008 Koshland, D. E., Jr., 758 Smith, Michael D., 735 Clowes, Royston C., 977 Sperl, George T., 719 Cooper, David G., 795 LeBlanc, Donald J., 878 Stellwag, Edmund J., 956 Cox, G. B., 705, 711 Lee, I.-M., 1056 Stepanov, V. M., 1017 Craine, Brian L., 740 Lee, Linda N., 878 Stocker, B. A. D., 830 Crandall, Marjorie, 1051 Lerner, Terry J., 1063 Streicher, Stanley L., 1000 Crow, Vaughan L., 878 Liu, H.-Y., 1056 Strongin, A. Ya., 1017 Cunningham, David, 925 Loeb, Marilyn R., 1031 Sukhodolets, V. V., 802 Dame, John B., 1043 McCann, Pamela A., 891 Tamura, Gakuzo, 839 Delwiche, Eugene A., 905 McConnell, Michael, 746 Tanenbaum, Stuart W., 925 DeMoss, John A., 719 McLaughlin, Calvin S., 1048 Tsuyumu, Shinji, 1035 de Renobales, Mertxe, 752 Maier, Robert J., 824 Dhawale, Motiram R., 916 Martins, Stanley A., 912 Ulitzur, S., 854 Downie, J. A., 705, 711 Meyer, Ortwin, 811 Umbarger, H. E., 846 Miller, James R., 885 Unger, Barbara W., 900 Edwards, David L., 900 Mironov, A. S., 802 Elliott, Steven G., 1048 Mudd, J. B., 1056 Muhlrad, Andras, 764 Wainscott, V. J., 1028 Evans, Harold J., 824 Waleh, Nahid S., 830 Fahnestock, Margaret, 758 Nainan, Omana V., 1040 Warner, Jonathan R., 1048 Fein, Jared E., 933 Nakada, Dai, 990 Warren, R. A. J., 1053 Flashner, Michael, 925 Newman, Karl F., 860 Watabe, Kazuhito, 773 Fontana, R., 727 Wilson, T. Hastings, 1037 Freese, E., 773 Old, David C., 1008 Winkler, Herbert H., 963 Frehel, Claude, 947 Oxender, Dale L., 1059 Wright, Andrew, 746 Frelat, Gerard, 1013 Wu, Henry C., 818 Pentella, Michael A., 891 Gallagher, Joseph E., 972 Pogell, Burton M., 891 Yaffe, Edna, 790 Garon, Claude F., 878 Pon, Nellie, 752 Yamada, Yoshihiko, 990 Gibson, F., 705, 711 Putzrath, Resha M., 1037 Yamasaki, Makari, 839 Glass, Thomas L., 956 Yaroslavtseva, N. G., 1017 Gracey, D. E. Fergus, 795 Quay, Steven C., 1059 Yoch, Duane C., 779 Gresshoff, P. M., 1020 Yordy, Denise M., 905 Grimminger, Herbert, 846 Raetz, Christian R. H., 860 Grindley, June N., 990 Redshaw, Peggy A., 891 Zajic, James E., 795 Grossman, Nili, 790 Rhoades, Keith R., 972 Zinder, Norton D., 1063