Figure 1
From: Relating the shape of protein binding sites to binding affinity profiles: is there an association?
Number of salient loadings across the 30 PCA factors of the MAF matrix. 30 factors were obtained from the matrix of the Molecular Affinity Fingerprints (MAFs) of target proteins by principal component analysis (PCA). The number of salient loadings (i.e., loadings with a value of ≥ 0.4 or ≤ -0.4) varied between 10 and 35 for the individual factors, indicating a simple factor structure since the number of variables in the original MAF matrix was 1,255.