Figure 3: Schematic representation of the domain in Vtg peptide sequence, (A) Domain architecture of teleost fish Vtg (Babin, et al., 2007). Large lipid transfer (LLT) module also referred to as Vtg_N and LPD-N domain, polyserine track (PT) domain, and von Willebrand-factor type-D domain (VWD). The horizontal line indicates the receptor-binding region to VtgR. Lipovitellin I (Lv-I) and II (Lv-II), phosvitin (Pv), and β-component (β-C) are the yolk protein generated by the enzymatic cleavage of Vtg inside the oocyte. Conserved domains of (B) Epinephelus lanceolatus, (C) Icthyomyzon unicuspis, (D) Dicentrachus labrax, and (E) Clarias macrochepalus Vtg by using NCBI software.