Model amyloid from the sequence GIVIVA from Als proteins. The individual peptides (each from one adhesin molecule) are stacked to form 4 β-sheets, each with 5 β-strands. The backbones of the peptides on top of each stack are marked with blue arrows. The sheets are paired through interactions of the hydrophobic side chains. Model was downloaded from Zipper DB http://services.mbi.ucla.edu/zipperdb/ [37].