signal peptidase subunit family protein. Identical to Signal peptidase complex subunit 3B [Arabidopsis Thaliana] (GB:Q53YF3); similar to signal peptidase subunit family protein [Arabidopsis thaliana] (TAIR:AT3G05230.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO17648.1); contains InterPro domain Signal peptidase 22 kDa subunit; (InterPro:IPR007653)