Semi-quantitative real-time RT-PCR analyses of: PHGDH (A); PSPH (B); SCD (C); CIDEC (D); AMD1 (E); ZIC1 (F); ERLEC1 (G); DNAJA1 (H); and ZNF181 (I) mRNA expression in the skeletal muscle of pigs fed a lysine-deficient diet (Diet 1), a lysine-adequate diet (Diet 2), and a lysine-excess diet (Diet 3). The y-axis shows the relative mRNA expression levels relative to the D2 pig group. The error bars denote SD, and the * signs denote differential expressions (p ≤ 0.05). PHGDH = Phosphoglycerate dehydrogenase; PSPH = Phosphoserine phosphatase; SCD = Stearoyl-CoA desaturase; CIDEC = Cell death-inducing DFFA-like effector c; AMD1 = Adenosylmethionine decarboxylase 1; ZIC1 = Zic family member 1; ERLEC1 = Endoplasmic reticulum lectin 1; DNAJA1 = DnaJ (Hsp40) homolog, subfamily A, member 1; ZNF181 = Zinc finger protein 181.