JOURNAL OF BACTERIOLOGY VOLUME 126 * NUMBER 3 * JUNE 1976 EDITORIAL BOARD L. LEON CAMPBELL, Editor-in-Chief (1980) University of Delaware, Newark S. G. BRADLEY, Editor (1979) ALLEN T. PHILLIPS, Editor (1980) Virginia Commonwealth University, Richmond Pennsylvania State University, University Park, Pa. ROY CURTISS HI, Editor (1979) CARL SCHNAITMAN, Editor (1978) University ofAlabama, Birmingham University of Virginia, Charlottesville ELIZABETH McFALL, Editor (1980) H. E. UMBARGER, Editor (1976) New York University, New York, N.Y. Purdue University, Lafayette, Ind. James N. Adams (1976) Walton L. Fangman (1978) Eugene W. Nester (1978) Arthur I. Aronson (1976) Gerald R. Fink (1978) Donald P. Nierlich (1977) Gad Avigad (1977) W. R. Finnerty (1976) Michio Oishi (1977) Stephen D. Barbour (1976) Walter R. Guild (1978) Ronald H. Olsen (1978) Blaine Beaman (1976) George Hegeman (1977) Charles Panos (1978) Claire M. Berg (1976) James A. Hoch (1977) Leo Parks (1976) Richard S. Berk (1977) Joy Hochstadt (1977) Martin Pato (1978) Harriet Bernheimer (1977) Stanley C. Holt (1977) Paul V. Phibbs (1976) Judith S. Bond (1977) Joseph Inselburg (1978) Charles C. Remsen III (1976) Winfried Boos (1976) Sam Kaplan (1977) William S. Reznikoff (1976) Jean Brenchley (1977) Jost Kemper (1978) Palmer Rogers (1978) George H. Brownell (1977) David E. Kenneil (1977) Antonio H. Romano (1976) Richard 0. Burns (1977) Bruce C. Kline (1977) Robert Rownd (1977) Donald B. Clewell (1977) Robert L. Lester (1978) Harold L. Sadoff (1977) Stanley N. Cohen (1976) Hillel S. Levinson (1978) Irwin H. Segel (1976) Ronald S. Cole (1977) James S. Lovett (1977) Jane K. Setlow (1978) S. F. Conti (1978) K. Brooks Low (1976) Stanley K. Shapiro (1976) Stephen Cooper (1978) Calvin S. McLaughlin (1978) Simon Silver (1976) John E. Cronan, Jr. (1977) P. T. Magee (1977) Lucile Smith (1978) Walter J. Dobrogosz (1976) Michael H. Malamy (1978) James A. Wechsler (1978) Patrick R. Dugan (1977) Manley Mandel (1978) David White (1977) Alan D. Elbein (1976) Robert E. Marquis (1976) Clifford A. Woolfolk (1976) Wolfgang Epstein (1978) Neil H. Mendelson (1978) Howard Zalkin (1976) David P. Fan (1978) Gene E. Michaels (1977) Robert A. Day, Managing Editor GiseUa Pollock, Director of Editorial Services Linda Illig, Production Editor 1913 I St., N. W., Washington, D. C. 20006 EX OFFICIO Helen R. Whiteley, President (1975-1976) Harlyn 0. Halvorson, Vice-President (1975-1976) J. Mehsen Joseph, Secretary Brinton M. Miller, Treasurer The Journal ofBacteriology, a publication of the American submitted manuscripts, and general editorial matters should Society for Microbiology. 1913 I St., N.W., Washington, D.C. be directed to the ASM Publications Office, 1913 I St., N.W., 20006, is devoted to the advancement and dissemination of Washington, D.C. 20006 (area 202 833-9680). fundamental knowledge concerning bacteria and other micro- organisms. The Journal is published monthly, and the twelve numbers are divided into four volumes per year. The non- Second class postage paid at Washington, D.C. 20006, and at member subscription price is $90 per year. Single copies are additional mailing offices. $8. The member subscription price is $17 per year. Corre- Made in the United States of America. spondence relating to subscriptions, reprints, defective copies, Copyright © 1976, American Society for Microbiology. availability of back issues, lost or late proofs, disposition of All Rights Reserved. Author Index Adams, James N., 1104 Hacking, Andrew J., 1166 Rake, Adrian V., 1305 Adhya, Sankar, 1108 Hamilton, W. Allan, 1224, 1232 Raymond, Jonathan, 1089 Hancock, Robert E. W., 1347 Rebouche, Charles J., 1207 Bass, Richard, 1119 Harriman, Philip D., 1141 Reeves, Peter, 1052, 1347 Beck, Barbara, 1250 Hebeler, Bruce H., 1180, 1186 Reyes, Oscar, 1108 Bergquist, P. L., 1063 Heffernan, Laurel, 1119, 1132 Rudd, Joanne, 1344 Bird, Robert E., 1215 Hochhauser, Steven J., 1082 Body, Barbara A., 1149 Holden, Joseph A., 1141 Sadaie, Yoshito, 1037 Broquist, Harry P., 1207 Sanemori, Hiroshi, 1030 Brownell, George H.,,1104 Ingebretsen, Ole C., 1075 Sanner, Tore, 1075 Brownstein, Bernard H., 1149 Ives, David H., 1136 Schaeffer, Pierre, 1342 Seto, Hiroyuki, 1113 Caro, Lucien, 1215 Jarvis, Audrey W., 1232 Shapiro, Lucille, 1305 Chandler, Michael, 1215 Shida, Hisatoshi, 1025 Chapman, Ann, 1351 Kadota, Hajime, 1342 Shinozawa, Takao, 1025 Cintr6n, Nitza M., 1082 Kapoor, V., 1245 Silbert, David F., 1351 Cole, Roger M., 1285 Kawasaki, Takashi, 1030 Slater, Martin L., 1339 Collins, Mary Lynne Perille, Kido, Toshiko, 1261 Soda, Kenji, 1261 1316, 1326 Kung, Fang-Chien, 1089 Subrahmanyam, C. S., 1042 Collins, Stephen H., 1224, 1232 Sypherd, Paul S., 1266 Curtiss, Roy, III, 1194 Lampky, J. R., 1278 Lin, E. C. C., 1166 Das, H. K., 1042 Lindsay, Raymond J., 1232 Tabita, F. Robert, 1271 Davies, John K., 1347 Lusk, Joan E., 1096 Tomasz, Alexander, 1113 Davis, Minh-Tam B., 1136 Truman, Penelope, 1063 McFadden, Bruce A., 1271 Egi, Yoshiko, 1030 Mendelson, Neil H., 1285 Uchida, Aritsune, 1342 Eisenberg, Roselyn J., 1344 Mooney, Duane T., 1266 Elchisak, Mary, 1344 Wall, Judy D., 1141 Englesberg, Ellis, 1119 Narui, Kikuko, 1037 Weiss, Bernard, 1082 Newman, E. B., 1245 Weiss, Richard L., 1173 Falkinham, Joseph O., III, 1194 Niederman, Robert A., 1316, White, Brian J., 1082 Foster, Gayle C., 1297 1326 Wilcox, Gary, 1132 Foster, R. Scott 1297 Wilson, David B., 1156 Park, James T., 1250 Wong, Brenda B., 1096 Glaser, Donald A., 1089 Park, Myung Hee, 1096 Wood, Nancy B., 1305 Gottesman, Max, 1108 Pohlman, Timothy, 1351 Potter, R., 1245 Yamamoto, Tatsuo, 1261 Haag, Steven M., 1285 Pugsley, Anthony P., 1052 Young, Frank E., 1180, 1186 INSTRUCTIONS TO AUTHORS Submit manuscripts in duplicate (original and Abstract. An Abstract appears at the beginning of one copy) to ASM Publications Office, 1913 I St., each paper in the Journal. The Abstract should not N.W., Washington, D.C. 20006. exceed 250 words. General policy. Any manuscript submitted must Literature Cited. In the text, references are cited be a report of unpublished original research, which by number. The Literature Cited section should be is not being considered for publication elsewhere. typed in alphabetical order, by first author, and Each manuscript should present the results of numbered. Each reference should include the title of an independent, cohesive study; numbered series the article and inclusive pagination. Names of papers are discouraged. Papers that deal primarily journals are abbreviated according to Bibliographic with a method should not be submitted. Guide for Editors & Authors (American Chemical The "editorial style" of the Journal essentially Society, 1974). Citations of abstracts, theses, "un- follows the CBE Style Manual (3rd ed., AIBS, 1972). published data," "personal communication," and, For bacterial genetic systems, the recommendations "in press" will not be accepted in the Literature of Demerec et al. (Genetics 54:61, 1966) should be Cited. followed, with the limited modifications of Taylor Tables. Each table should be typed on a separate and Trotter, Sanderson, and Low (Bacteriol. Rev. page. The data should be arranged so that columns 36:504-524; 558-586; and 587-607, 1972). For yeast, of like material read down, not across. Explanatory Chlamydomonas, and several fungal species, sym- footnotes are permitted, but detailed descriptions bols such as those given in Handbook of Micro- of the experiments are not. The materials and biology (1974, A. I. Laskin and H. A. Lechevalier, methods used to gain the data should properly eds., CRC Press, Cleveland, p. 665-711, Vol. IV) remain in the section of that name. should be employed. For genetic nomenclature, use Figures. A complete set of figures, preferably italics consistently for genotype symbols. Greater glossy photographs, should accompany each of the leniency can be allowed for phenotypic symbols. two copies of the manuscript. Graphs (submit as However, they should not be italicized. The pre- photographs) should be finished drawings not need- ferred convention is to use the same three-letter ing further artwork or type-setting. Absolutely no symbols in Roman type with the first letter capital- part of a graph should be typewritten (except the ized. legend, which should be typed on a separate page). Biochemical nomenclature, including abbrevia- Most graphs will be reduced to one-column width, tions and symbols, should follow the recommenda- and all elements in the drawing should be prepared tions of the IUPAC-IUB Commission on Biochemi- to withstand this reduction. The legend ofthe figure cal Nomenclature (CBN) and the Instructions to should provide enough information so that the Authors of J. Biol. Chem. and Arch. Biochem. figure is understandable without reference to the Biophys. (first issue of each year), which are based text. Experimental details from Materials and upon the CBN Recommendations and contain a list Methods should not be repeated in figure legends. thereof. Reprints of these Recommendations and Figure ordinate and abscissa scales, and table advice on biochemical and chemical nomenclature column headings, should avoid ambiguous use of are available from the NRC Office of Biochemical numbers with exponents (see p. 140, CBE Style Nomenclature (W. E. Cohn, Director), Biology Manual). Division, Oak Ridge Nat'l. Lab., Box Y, Oak Ridge, Nomenclature of microorganisms. In general, Tenn. 37830 (phone: 615-483-8611, Ext. 3-7514). the nomenclature presented in Bergey's Manual of Normally, abbreviations (except those of standard