L-leucine + L-arginine <=> N-amidino-L-leucine + L-ornithine
l-leucine + l-arginine <=> n-amidino-l-leucine + l-ornithine
L-leucine + L-arginine <=> N-amidino-L-leucine + L-ornithine
l-leucine + l-arginine <=> n-amidino-l-leucine + l-ornithine