Coiled coil homodimer derived from Beclin-1.  These models include thicker backbone and more links between chains.  Links correspond to every 1 & 4 position in the repeating pattern, so mark the mostly hydrophobic core.  The hybrid model also includes 4 extrior Ser residues, which can serve as a model of Cys (which this sequence lacks) to indicate where disulfide bond formation occurs in keratin and other such linked coiled coils.