Fig. 1.
Plasma-derived and recombinant human factor XI.
Two-microgram samples of (lane 1) plasma-derived factor XI, (lane 2) wild-type recombinant factor XI, (lane 3) factor XI–R226, and (lane 4) factor XI–N248 were size-fractionated under reducing and nonreducing conditions on a 7.5% polyacrylamide-SDS gel. The gel was stained with Gelcode Blue. The positions of molecular mass standards are given in kilodaltons on the left.