Residues with significant chemical shift perturbations (CSPs). Fatty acids are shown in red‐brown, ethanolamides in blue, and glycerol esters in green. Patterns in binding appear when ligands are grouped according to head group; specifically, the periodicity in significant CSPs, a gap in CSPs between residues 80–110 for fatty acids with IFABP, and additional significant CSPs between residues 66–70 for all the ligands with IFABP