Which of the Following is an Actin Homolog

Question

Which of the following is an actin homolog?
A) Arp2
B) Arp3
C) MreB
D) ParM
E) All of the above

Accepted Answer

Arp2 and Arp3 are actin homologs in the Arp 2/3 complex, which nucleates actin filaments by taking advantage of the structural similarities between these molecules and the actin subunits. MreB and ParM are bacterial actin homologs.