These are known as fibrino peptides and what we ultimately form is a fibrin monomer that consists of these three different subunits. So alpha, B and gamma. And we have twice the number of these. So these are the two of our so that should actually be not a B but a beta. So this should be a beta. So we have two of these orange betas, we have two of these green gammas and then we have these red alphas and we basically removed these purple A's and those blue BS.