Fig. 5
From: Uncovering sperm metabolome to discover biomarkers for bull fertility
Variable importance in projection (VIP) scores of spermatozoa metabolites in high (HF) and low fertility (LF) bulls. The selected metabolites were those with VIP > 1.5. Heat map with red or green boxes on the right indicates high and low abundance ratio, respectively, of the corresponding metabolite in HF and LF bulls. VIP score was based on the PLS-DA model. GABA (VIP = 2.01), carbamate (VIP = 1.88), benzoic acid (VIP = 1.86), lactic acid (VIP = 1.81), and palmitic acid (VIP = 1.5)