TABLE 2.

Homology between human and mouse PBX proteins^a

PBX protein	No. of identical amino acids/total	% Amino acid identity
1a	430/430	100
1b	347/347	100
2	421/430	97.9
3a	433/434	99.8
3b	349/351	99.4

^aThe sequences of the proteins encoded by the mRNAs for each species of PBX mRNA for mouse and human were compared. The GenBank accession numbers for the mouse cDNA sequences are as follows: PBX1a, AF020196; PBX1b, AF020197; PBX2, AF020198; PBX3a, AF020199; PBX3b, AF020200.