the evidence for this being the sole system for homoserine transport is ( i ) a linear double-reciprocal plot showing a homoserine k ( m ) of 9.6 x 10 ( -6 ) m , ( ii ) simultaneous reduction by 85 % of homoserine and branched-chain amino acid uptake in a mutant selected for its inability to transport homoserine , and ( iii ) simultaneous reduction by 94 % of the uptake of homoserine and the branched-chain amino acids by cells grown in millimolar leucine .
C0002521
branched-chain
C0023401
leucine