LIN7B, also known as VELI2, belongs to the Velis family. Velis are a family of small synaptic proteins that interact with other proteins at the post-synaptic density (PSD) of neuronal synapses. Velis contain the PDZ motif involved in recruiting cell adhesion molecules, receptors, and channels. Lin7B is ubiquitously expressed with high expression in brain, liver, and testis.