Fig. 2From: Remnants of ancestral larval eyes in an eyeless mollusk? Molecular characterization of photoreceptors in the scaphopod Antalis entalisThe retinal-binding domain of scaphopod Go-opsin lacks the highly conserved lysine K296. Alignment of representative sequences from Ramirez et al. [8] highlight conserved motifs as per Vöcking et al. [18]. The highly conserved lysine (K) at position 296 is absent from placozoan opsins (=‘placopsins’) and from aen-Go-opsinBack to article page