Occurrence of a Single Helix of the Collagen Type in Globular Proteins

The occurrence of an eight-residue long segment of polypeptide chain in collagen helical conformation has been detected in bacteriochlorophyll a-protein by the application of an algorithm for identifying secondary structures in globular proteins from their $\alpha$-carbon positions. This segment spans residues 277 to 284 of the protein and is the longest known stretch of collagen helix to be observed in globular proteins