Spring2d

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Spring2d - suite of programs that analyze two-dimensional images of helices

Program to extract overlapping segments from micrographs

Program to examine all excised in-plane rotated segments and compute their collapsed (1D) and 2D power spectrum and width profile of helices

Program to classify excised in-plane rotated segments using SPARX’s k-means clustering

Program to align segments from helical specimens with a restrained in-plane rotation of 0 or 180 +/- delta degrees

Program to examine helix classes to compute their collapsed (1D) and 2D power spectrum and width profile of helices

Program to extract amplitudes and phases from desired layer lines of class averages

Program to simulate helical diffraction pattern and plot helical lattice from a series of indexed layer lines or rise/rotation parameters

Program to plot parameters from segmented helices