Table I.

Chromosomal mapping and length in amino acid residue numbers of STATs.

Member of STAT family	Chromosomal localization of coding genes	Molecular length (amino acids)
STAT1	Chromosome 2	750
STAT4	Chromosome 2	748
STAT2	Chromosome 12	851
STAT6	Chromosome 12	847
STAT3	Chromosome 17	770
STAT5A	Chromosome 17	794
STAT5B	Chromosome 17	787

The coding genes for STAT family members are mapped in three chromosomal clusters as indicated. Each subgroup shows similar range of full length with amino acid numbers. STAT, signal transducer and activator of transcription.