Figure 1.

Showing the amino acid sequence comparison of PGRP-S from camel, human, C-terminal PGN domain of human, common lancelet, Drosophila, bumblebees, and tobacco hornworm. The segments involved in the intermolecular arrangement between molecules A and B are indicated in red while those responsible for the formation of C-D dimer are shown in green. The critical residues for the formation of A-B dimer are Ser8 and Asn126 (shown in purple) while those in the formation of C-D dimer are Pro96 and Pro151 (shown in blue).