Gene expression in tissues of sows at lactation d 28. In adipose tissue, the relative mRNA abundances of lipolysis (HSL, ATGL), glutamate and glucose metabolism (SLCIA3, GLUT4, VAMP2, VAMP3, VAMP8, PKLR, LDHB, GLUL) and tricarboxylic acid cycle (CS, IDH2, IDH1, OGDHL, OGDH, DLST) (a). In mammary gland, the mRNA abundances of cell proliferation (CCND1, CCND2, CCND3, CDK4, CCNB1, CDK1, MKI67), glutamate and nucleotide metabolism (SLC1A5, SLC1A1, GLUL, GLUD1, GPT, GPT2, CAD, PPAT, PSAT1, GOT1 and GOT2), and Notch signaling pathway (DLL1, DLL3, DLL4, JAG1, JAG2, NOTCH1, NOTCH2, NOTCH3, NOTCH4) (b). Values are least-squares means with SE. Mean values were significantly different from those of the control group: *P < 0.05. It was considered significant at P < 0.05. CON, control; RFA, restricted feed allowance