The two key components in protein targeting in ER:

Signal recognition particle (SRP)

SRP receptor

TLS Online TPP Program

#Id: 8620

#Section 3: Genetics, Cellular and Molecular Biology

A second class of CKIs found in metazoan cells is the Cip/Kip family of CKIs, consists of three proteins—p21CIP, p27KIP1, and p57KIP2. 

TLS Online TPP Program

#Id: 8153

#Section 3: Genetics, Cellular and Molecular Biology

A second function of small GTPases in vesicle formation is in the pinching off of a completed vesicle from the parent membrane

TLS Online TPP Program

#Id: 9288

#Section 2: General Biology

TLS Online TPP Program

#Id: 8046

#Section 2: General Biology

TLS Online TPP Program

#Id: 8991

#Section 3: Genetics, Cellular and Molecular Biology

Incomplete lineage sorting (hemiplasy)

If you make a phylogenetic tree of how the alleles are related to each other, it does not mirror how the species split apart.