Figure 1.

Comparison of the AtCSN2 Sequence with Its Homologs from Other Organisms.

(A) Protein sequences of AtCSN2 (At) and its homologs from human (Hs) and S. pombe (Sp). Boxed residues indicate amino acid identity. The underlined sequence corresponds to the PCI domain of AtCSN2. Numbers at left indicate the positions of the first amino acid residues in each row.

(B) Comparison of peptide sequences from cauliflower CSN2 with the corresponding AtCSN2 protein sequences. Vertical bars indicate identity. Numbers at left of the peptide sequences indicate HPLC fraction numbers. The numbers for the Arabidopsis peptides indicate the last amino acid positions in each row.