Table I.

Size, expression characteristics, and nuclear position of BAC transgenes in ES cells

BAC clone Insert copy number/size estimate Expression relative to the endogenous locusa Cells with LacI signal touching the nuclear periphery Mean/median distance of LacI signal from nuclear periphery 
  % % µm 
β-Globin 2b 893 (205 Mb) NA 84 (n = 32) 0.053/0.00 
β-Globin 8d 158 (36.3 Mb) NA 78 (n = 27) 0.075/0.00 
β-Globin 3f 54 (12.4 Mb) NA 52 (n = 27) 0.101/0.00 
α-Globin 1c 609 (115 Mb) 11.8 16 (n = 25) 0.34/0.35 
α-Globin 7d 105 (20 Mb) 6.6 26 (n = 23) 0.323/0.312 
α-Globin 5c 56 (12.5 Mb) 7.3 4 (n = 23) 0.58/0.485 
Dhfr 36 278 (52.8 Mb) 52.8 16 (n = 32) 0.359/0.261 
Dhfr 44 271 (51.5 Mb) 35.3 7 (n = 28) 0.340/0.377 
Dhfr 33 111 (21 Mb) 11.1 15 (n = 27) 0.445/0.384 
BAC clone Insert copy number/size estimate Expression relative to the endogenous locusa Cells with LacI signal touching the nuclear periphery Mean/median distance of LacI signal from nuclear periphery 
  % % µm 
β-Globin 2b 893 (205 Mb) NA 84 (n = 32) 0.053/0.00 
β-Globin 8d 158 (36.3 Mb) NA 78 (n = 27) 0.075/0.00 
β-Globin 3f 54 (12.4 Mb) NA 52 (n = 27) 0.101/0.00 
α-Globin 1c 609 (115 Mb) 11.8 16 (n = 25) 0.34/0.35 
α-Globin 7d 105 (20 Mb) 6.6 26 (n = 23) 0.323/0.312 
α-Globin 5c 56 (12.5 Mb) 7.3 4 (n = 23) 0.58/0.485 
Dhfr 36 278 (52.8 Mb) 52.8 16 (n = 32) 0.359/0.261 
Dhfr 44 271 (51.5 Mb) 35.3 7 (n = 28) 0.340/0.377 
Dhfr 33 111 (21 Mb) 11.1 15 (n = 27) 0.445/0.384 

NA, not applicable.

a

Based on reverse transcription quantitative PCR data for C16orf33 (α-globin clones) and Dhfr (Dhfr clones).

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