A1U1X8O1T1R1O1P3H4S1
22 points
AUXOTROPHS is validvalid
AUXOTROPH, an organism, such as a strain of bacteria, that has lost the ability to synthesize certain substances required for its growth and metabolism as the result of mutational changes [n]
AUXOTROPH, an auxotrophic strain or individual, i.e. one requiring a specific growth substance beyond the minimum required for normal metabolism [n]