Component of the signal recognition particle (SRP) complex, a ribonucleoprotein complex that mediates the cotranslational targeting of secretory and membrane proteins to the endoplasmic reticulum (ER) (By similarity). F37F2.2/srpa-19 together with F25G6.8/srpa-14 and the Alu portion of the SRP RNA, constitutes the elongation arrest domain of SRP (By similarity). The complex of F37F2.2/srpa-19 and F25G6.8/srpa-14 is required for SRP RNA binding (By similarity). Heterodimer with ZK512.4/SRP9; binds RNA as heterodimer (By similarity). Component of a signal recognition particle (SRP) complex that consists of a 7SL RNA molecule of 300 nucleotides and six protein subunits: srpa-72, srpa-68, SRP54, F37F2.2/SRP19, F25G6.8/SRP14 and ZK512.4/SRP9 (By similarity). Belongs to the SRP14 family.