... Copenhagen,Denmark.(Received 7 February 20 03, revised 15 April 20 03,accepted 17 April 20 03)Eur. J. Biochem. 27 0, 25 76 25 82 (20 03) Ó FEBS 20 03 doi:10.1046/j.14 32- 1033 .20 03.03 625 .x[8,9,11–16], and the same area has ... toeach other in an area of the C-terminal part of the TF1domain and the N-terminal portion of the TF2 domain(Fig. 1). Mutation and labeling of positions 99 and 104 hadlittle effect on the FX-activating ... USA).Characterization of the cofactor properties of the sTF variantsAn amidolytic activity assay using 1 mMS -22 88 (Chromo-genix, Mo¨lndal, Sweden) was performed to determine the affinity of the sTF variants...