Ras-Related Protein Rap-1b

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** Ras-related protein Rap-1b (184 aa, ~21 kDa) is encoded by the human RAP1B gene. This protein plays a role in endothelial cell polarity, vascular lumen maintenance, GTPase activity and integrin signaling.

**Synonyms:** - EC 3.6.5.2 - GTP-Binding Protein Smg p21B - K-REV - RAP1B - RAS-Related Protein RAP1B - Ras Family Small GTP Binding Protein RAP1B - Ras-Related Protein 1b