A, extracts from 20 oocytes were prepared as in Fig. 9 and incubated 16 h with 0.1 mg of MBP bound to amylose resin or 0.1 mg of MBP-Csp bound to amylose resin. The resins were washed with buffer A and extracted with SDS sample buffer for Myo1e immunoblot analysis. The extract lane reflects the Myo1e immunoreactivity in extract from a single oocyte. B, equivalent amounts (0.1 mg) of MBP or MBP-Csp were bound to amylose resin and incubated in a solution containing 20 μl of in vitro translated (IVT) Myo1e, Myo1e-head, or Myo1c (see “Experimental Procedures”). After washing, the resin was extracted with SDS sample buffer and subjected to immunoblot analysis. The in vitro translated (IVT) lanes show the immunoreactive Myo1e, Myo1e-head (~75 kDa) or Myo1c (~105 kDa), in 2.5 μl of the in vitro translation reaction. None of these proteins bound to amylose resin with MBP. Only Myo1e was detected bound to resin containing MBP-Csp.