PCR products with isoform-specific primers and leukocyte (A) or bone marrow (B) cDNA as template. (A Left) Lanes: L, a 1-kb mass ladder (Life Technologies); 1, α1-specific primer pair A1-1 and A1-2, expected product of 530 bp; 2, α2-specific primer pair A2-1 and A2-2, expected product of 612 bp; 3, α3-specific primer pair A3-1 and A3-2, expected product of 540 bp; 4, α4-specific primer pair A4-1 and A4-2, expected product of 494 bp; 5, β1-specific primer pair B1-1 and B1-2, expected product of 441 bp; 6, β2-specific primer pair B2-1 and B2-2, expected product of 455 bp; 7, β3-specific primer pair B3-1 and B3-2, expected product of 414 bp. (Right) Lanes L and 8 are from a 3% gel. Lanes: L, 1-kb mass ladder; 8, γ-specific primer pair γ1 and γ2, expected size 186 bp. (B Left) Lanes: L, a BRL 1-kb mass ladder; 1, α1-specific primer pair A1-1 and A1-2, expected product of 530 bp; 2, α2-specific primer pair A2-1 and A2-2, expected product of 612 bp; 3, α3-specific primer pair A3-1 and A3-2, expected product of 540 bp; 4, α4-specific primer pair A4-1 and A4-2, expected product of 494 bp; 5, β1-specific primer pair B1-1 and B1-2, expected product of 441 bp; 6, β2-specific primer pair B2-1 and B2-2, expected product of 455 bp; 7, β3-specific primer pair B3-1 and B3-2, expected product of 414 bp. (Right) Lanes L and 8 are from a 3% gel. Lanes: L, a 1-kb mass ladder; 8, γ-specific primer pair γ1 and γ2, expected size 186 bp.