Identification of system y+L as the high-affinity transporter for L-arginine in human platelets: up-regulation of L-arginine influx in uraemia.
Kinetic studies of L-arginine transport in human platelets have identified a high-affinity, low-capacity transport system [Michaelis-Menten constant (K(m)) about 10 microM] for cationic amino acids that also transports neutral amino acids with high affinity in the presence of Na+ but not K+. These characteristics, together with our kinetic cis-inhibition studies, indicate that saturable L-arginine transport in human platelets is mediated via the system y+L and not the classic cationic transpo...Expand abstract
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