The 19ek.Fc microspheres roll in vivo.

The 19.ek.Fc microsphere interactions with the postcapillary venules of mice were observed. A segment of a postcapillary venule is shown. (A) Images were taken 1 second apart and superimposed to generate the composite image. The white sphere is a 19.ek.Fc microsphere rolling along the wall of the venule. (B) Images were taken 1/30 of a second apart and superimposed to generate the composite image. At several points a blur is observed. This is a 19.ek.Fc microsphere not interacting with the venule. The solid sphere is the same 19.ek.Fc microsphere seen in panel A.