From the Uniprot database, we retrieved Zika E and nerve-related sequences. Then, using the local MEME version, we searched for E's conserved growth factor-related domains. As illustrated in Table , the E protein contains CTCK, NGF, EGF-like, and TGF BETA 2 domains. CTCK A and B each have four and two Cys, while NGF A, B, and E each include six, two, and two Cys.