Lysine deficient diet and lysine replacement affect food directed operant behavior

As a test for specific hunger for amino acids with the goal of identifying brain regions which might mediate motivation to alleviate l-lysine (Lys) deficiency, rats were trained to lever press to receive complete diet. Rats were given Lys deficient (Lys-def) diet ad lib. Intraperitoneal (IP) injecti...

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