Analysis of transgenic skin protein extracts by
SDS/PAGE and immunoblotting. (Upper) Mouse K6 (mK6)
immunoblot. (Lower) Myc tag immunoblot. Lanes: 1–3, 15
μg protein loaded; 4–7, 5 μg protein loaded. Samples are as
follows: lane 1, control mouse, intact skin; lane 2, 19–1p mouse
(2.5-kb promoter), intact skin; lane 3, 21–1p mouse (5.2-kb promoter),
intact skin; lane 4, 19–2m mouse (2.5-kb promoter), PMA-treated skin;
lane 5, 19–1p mouse (2.5-kb promoter), PMA-treated skin; lane 6,
21–1p mouse (5.2-kb promoter), PMA-treated skin; lane 7, 21–1m
transgenic mouse (5.2-kb promoter), PMA-treated skin; lane 8 (myc
immunoblot only); 20 ng of purified recombinant ΔK6a-myc protein.
Note the strong induction in K6 protein after PMA treatment (lanes
4–7; mK6 blot), and the variable extent of ΔK6a-myc product among
various transgenic lines (myc blot).