a beta-2-thienylalanine-resistant mutant ( bt-7 ) derived from p-fluorophenylalanine mutant ( c-4000 fp-4 ) and resistant to both p-fluorophenylalanine and beta-2-thienylalanine produced 0.5 g of l-phe and 0.15 g of l-tyrosine per liter from 10 g of starch per liter when growing in a minimal medium . trans-cinnamic acid ( ca ) was also excreted by both mutants , indicating the possibility of l-phenylalanine ammonia-lyase-induced deamination of l-phe to ca .
C0030137
p-fluorophenylalanine
C0031453
l-phe