{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T02:16:46Z","timestamp":1773627406484,"version":"3.50.1"},"reference-count":17,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[2009,6,1]],"date-time":"2009-06-01T00:00:00Z","timestamp":1243814400000},"content-version":"unspecified","delay-in-days":11323,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Dairy Research"],"published-print":{"date-parts":[[1978,6]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>All 47 non-nisin producing strains of<jats:italic>Streptococcus lactis<\/jats:italic>and 12\/13 strains of<jats:italic>Str. lactis<\/jats:italic>subsp.<jats:italic>diacetylactis<\/jats:italic>examined produced bacteriocins, for which the term lactostrepcins is suggested. Seven strains of<jats:italic>Str. cremoris<\/jats:italic>examined produced no bacteriocins active against 3 lactic streptococci strains used as indicators. The strains examined were divided into 3 groups: I, those producing lactostrepcins active against only one streptomycin resistant mutant of<jats:italic>Str. lactis<\/jats:italic>60 indicator strain; II, those producing lactostrepcins active against all 3 indicator strains; III, those not producing lactostrepcins active against the indicator strains employed. The lactostrepcins were sensitive to various proteolytic enzymes and to phospholipase D, but retained full or partial activity after dialysis. Most of the bacteriocins studied were fully active only within the pH range 4\u00b72\u20135\u00b70 and were reversibly inactivated at pH 7\u00b70 or 8\u00b70. Results suggested occurrence of 4 different lactostrepcins. The lactostrepcins produced by all group I strains were the same, but there were differences among the lactostrepcins produced by group II strains. Lactostrepcins killed some \u03b2-haemolytic streptococci and some strains of<jats:italic>Lactobacillus helveticus<\/jats:italic>. One of the lactostrepcins was also active against certain<jats:italic>Leuconostoc<\/jats:italic>strains, but not against other<jats:italic>Leuconostoc<\/jats:italic>strains, nor against<jats:italic>L. helveticus<\/jats:italic>or other Gram-positive bacteria.<\/jats:p>","DOI":"10.1017\/s0022029900016423","type":"journal-article","created":{"date-parts":[[2009,6,5]],"date-time":"2009-06-05T11:11:16Z","timestamp":1244200276000},"page":"247-257","source":"Crossref","is-referenced-by-count":48,"title":["Lactostrepcins - acid bacteriocins produced by lactic streptococci"],"prefix":"10.1017","volume":"45","author":[{"given":"Witold","family":"Kozak","sequence":"first","affiliation":[]},{"given":"Jacek","family":"Bardowski","sequence":"additional","affiliation":[]},{"given":"W\u0142adys\u0142aw T.","family":"Dobrza\u0144ski","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2009,6,1]]},"reference":[{"key":"S0022029900016423_ref016","doi-asserted-by":"crossref","first-page":"722","DOI":"10.1128\/MMBR.40.3.722-756.1976","volume":"40","author":"Tagg","year":"1976","journal-title":"Bacteriological Reviews"},{"key":"S0022029900016423_ref015","doi-asserted-by":"crossref","unstructured":"Reeves P. 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