For those who cannot find the motif they want in the predefined motifs the ability to specify a motif is available. It runs on the same algebra, but is not as specific since it is not measuring specific atoms against each other. It is used to check to see if whole residues are within a certain angstrom distance from one another. The top of this tab contains the simpler and easier to use "linear" motif, in which a measured distance is specified for selections A, B, C, and or D. A is measured to B, B to C, and C to D. The more complex method entails a specification of all 4 against one another. All selections also have accompanying sliders to control the angstrom range which is acceptable to return.