FIG. 6.

FNIII domain deletion series. CDNAs encoding a series of FNIII deletions in the PTPσ ectodomain were fused in frame to PLAP and expressed by 293T cells. Supernatants containing similar levels of these fusion proteins, FN1d-AP to FN8d-AP, were immunoblotted and detected with anti-PTPσ serum IG2. Proteins of the correct sizes were detected in each case. Molecular mass markers are indicated to the left.