This function visualizes alpha-helical peptides as helical wheels. Sequences between 2 and 18 (inclusive) characters can be visualized. The residue in the upper half of the wheel lying at the horizontal center representing the amino acid at the N-terminus (first in `sequence`).
draw_wheel(sequence, col = c("grey", "yellow", "blue", "red"), labels = FALSE, label.col = "black", fixed = TRUE, legend = FALSE)
Arguments
| sequence | character vector containing amino acid sequence from N-terminus to C-terminus |
|---|---|
| col | colors for each amino acid type in the following order: nonpolar residues, polar residues, basic residues, acidic residues |
| labels | logical value; if TRUE, one-letter residue codes are overlaid on the residue circles |
| label.col | character value for color of labels added if `labels = TRUE` |
| fixed | if TRUE (default), ensures that residues will be circles (not ellipses) even if graphics device is rectangular |
| legend | if TRUE, adds legend to plot |
Examples
draw_wheel("GIGAVLKVLTTGLPALIS")draw_wheel("QQRKRKIWSILAPLGTTL")
