actin filaments are found in amebas ( 1 , 12 , 13 ) which react with vertebrate heavy meromyosin ( hmm ) , forming arrowhead complexes as vertebrate actin ( 3 , 9 ) , and are prominent within the ectoplasmic tube where some of them are attached to the plasmalemma ( 1 , 12 ) .
C0025979
actin filaments
C0001271
actin