The Jmol image is based on pdb file 4OGA Insulin interacting with part (site 1) of the human insulin receptor

Here is a backbone model showing how human insulin interacts with part of the human insulin receptor.

This is the insulin and insulin receptor active site.

Insulin when present in the concave area of this chain (in between the yellow/goldenrod chains) causes change in the protein causing a cascade that signals the cell to take in glucose and store it into glycogen or fats.

Broad overview of clear differentiated chains(Insulin A=Blue, Insulin B=Green, Insulin Receptor Alpha=Purple, Insulin Receptor Domains=Yellow, Monoclonal Antibody Light Chain=Orange, Monoclonal Antibody Heavy Chain=Red)

Citations: https://www.rcsb.org/structure/4oga https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4143003/ https://pdb101.rcsb.org/motm/182