초록
<P>17 amino acids were used to examine their effects on production of bacterial cellulose (BC) by<I>Acetobacter xylinum</I>. It found that these amino acids can be classified into three groups based on BC production: the efficient group (His/Glu/Asp/Thr/Leu/Ala/Cys), the less efficient one (Met/Ser/ Arg/Phe/Val/Pro/Try/Cystine/Tyr) and the non-efficient one (Lys). Among the efficient group, effects of amino acids on BC were insignificant except His through a L8(2<SUP>7</SUP>) factorial design, so it concluded that His was the best amino acid for BC produced by<I>A. xylinum</I>in defined medium. Even so, His was not the best nitrogen source, compared to ammonium sulphate. When His and ammonium sulphate co-existed in the medium, they were both comsumed by<I>A. xylinum</I>independently, but their synergic effect on BC production was not significant.</P>