contracting solution ( free ca2+ 7 x 10 ( -5 ) m ; with added mgatp ) applied locally from a micropipette to cells popped in rigor ( free ca2+ less than 10 ( -8 ) m ) or relaxing ( free ca2+ less than 10 ( -8 ) m ; with added mgatp ) solutions induced symmetrical contractions of unstretched cytoplasm and directional shortening of stretched cytoplasm .
C0007634
cells
C0010834
cytoplasm