Table I. APC phosphorylation sites determined by mass spectrometry.

Phospho-residues are indicated by the amino acid position in upper case. Sequences used for the generation of phospho-antibodies are shaded in dark grey. In sequences shaded in light grey the identity of the phospho-residues could not be determined with certainty. In these sequences at least one but possibly multiple sites are phosphorylated. In these cases all residues are labelled, where the mass spectrometry data indicated possible phosphorylation. n.d., the corresponding peptide was not detected.