From: Characterization of a monoclonal antibody with specificity for holo-transcobalamin
Motif 1
CS-x1-x2-Y-x3-W-D-x4-x5-x6-CS
x1 = F, G, L
x2 = F, L, R
x3 = L, P, Q
x4 = M, Q, Y
x5 = D, F
x6 = M, R
Motif 2
CS-F-F-Y-S-L-C-Y-C-W-CS