Fig. 3.

Growth of UA159, malQ mutant aeU1, and glgP mutant zKU1. The growth medium used was BTR-broth, whose composition is described in the text. Ten microliters of filter-sterilized saliva were added at the arrow into 10-ml culture of strain UA159 in panel (a). Abbreviations: UA-, UA159. The mutant aeU1 did not grow with maltotriose or maltodextrin and the mutant zJU1 also did not utilize these maltooligosaccharides as well as maltose. These results were eliminated from panel (b) of this figure to avoid ambiguity but are presented with the results for aeU1-mlt.