2d 402D-40 is a self-developed two-dimensional dilation module product by Lingxi Microlht. This product wehs 8g, has a large field of view angle of 40 ° FOV, a 25mm large exit pupil, aKV2D-40 (Immunoglobulin Kappa Variable 2D-40) is a Protein Coding gene. An important paralog of this gene is KV2-28. V region of the variable domain of immunoglobulin