The Front Stops Short of the Core: Depth-Resolved Arrest of a Labelled Galectin-3 Construct in a Tumour-Spheroid Line, Read as Sorbing-Solute Transport Resolving to The Front Stops Short of the Core: Depth-Resolved Arrest of a Labelled Galectin-3 Construct in a Tumour-Spheroid Line, Read as Sorbing-Solute Transport…