Predicted to be involved in several processes, including integrin activation; positive regulation of immunoglobulin production; and regulation of B cell proliferation. Predicted to be located in endoplasmic reticulum lumen. Predicted to be part of endoplasmic reticulum chaperone complex. Predicted to be active in extracellular region. Orthologous to human MZB1 (marginal zone B and B1 cell specific protein). [provided by Alliance of Genome Resources, Apr 2022]