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. 2012 Feb 14;116(29):8449–8459. doi: 10.1021/jp212173f

Figure 2.

Figure 2

Motions associated with first two principal components. A principal component analysis of the conventional MD trajectory of the calcium bound TnC regulatory domain (1AP4) was performed. The range of motions associated with PC1 (A) and PC2 (B) is shown as the overlay of two structures. Movement of helix A is not part of the first two principal components. The biggest difference between PC1 and PC2 is apparent in the movement of helix B. In the motion associated with PC1, helix B slides with respect to helix A, whereas it is tilted toward helix A in the motion associated with PC2.