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. 2021 May 5;8:654223. doi: 10.3389/fvets.2021.654223

Figure 3.

Figure 3

Plots from Principal Components Analysis of the top 24 variables that explained the most variability among diets. (A) Factor loadings plot for factor 1 and factor 2. (B) A plot of weighted factor scores for components 1 vs. components 2 for each test diet in this study from the Principal Components Analysis. The size of the shape indicates the 95% confidence intervals and distance between shapes indicates greater difference among diets. Higher, positive scores for Factor 1 were associated with high dietary chicken content, dietary crude protein, dietary sulfur amino acid content (SAA; cysteine, methionine and taurine), fecal bile salts, dietary available carbohydrate and fat digestibility, but low amylose and all fiber types. In contrast, a high positive score for Factor 2 was associated with high fasting blood glucose, long time to peak blood glucose, high glycemic index and high plasma methionine, but low plasma cysteine, plasma half-cysteine and plasma taurine. SOL_HMWDF, soluble high molecular weight dietary fiber; INSOL_HMWDF, insoluble high molecular weight dietary fiber; TDF, total dietary fiber; LMWDF, low molecular weight dietary fiber; TTP_GLUCOSE, time to peak glucose; FASTING_GLUC, fasting blood glucose; AUC_GLUCOSE, area under the curve for blood glucose response; GI, glycemic index; PLASMA_MET, plasma methionine; MET_DIET, dietary level of methionine; TAUR_DIET, dietary level of taurine; DIG_FAT, total tract apparent digestibility of fat; DIG_STARCH, total tract apparent digestibility of starch; FECAL BILE, fecal bile salts; DIG_PROTEIN, total tract apparent digestibility of protein; DIG_MET, total tract apparent digestibility of methionine; AVAIL_CHO, available carbohydrate in diet; PLAS_TAU, plasma taurine; PLAS_HALFCYS, plasma half-cysteine; PLAS_CYS, plasma cystine.