Human fetal liver contains a family of carcinoembryonic antigen related glycoproteins called the pregnancy specific β1 glycoprotein/fetal liver non specific cross-reactive antigen ( PSβG FL-NCA) glycoprotein family. The sequence for the major FL-NCA species has been reported [Khan et al., Proc. Natl. Acad. Sci. USA 1989, 86 in press]. Two additional CEA-related fetal liver glycoproteins FL-NCA-2 and 3 were cloned, sequenced and expressed. FL-NCA-3 is a new gene family member. It has a unique domain arrangement (N-A2-B2-T) and contains a hydrophobic tail. FL-NCA-3 has a molecular weight of ∼ 54 kD and is released from the transfected cells. Like three other members of the family, FL-NCA-3 contains the Arg-Gly-Asp sequence in a position in the N-domain corresponding to complementarity determining region 3 of immunoglobulin. FL-NCA-2 is identical in structure to PSβG-D previously found in placenta. The PSβG FL-NCA glycoprotein family may be involved in processes related to cell adhesion and cell differentiation.
|Original language||English (US)|
|Number of pages||11|
|Journal||Biochemical and biophysical research communications|
|State||Published - Jun 15 1989|
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology