1Xie S C, Low B G, Nagel R J, et al. Identification of the major pregnancy-specific antigens of cattle and sheep as inactive members of the aspartic proteinase family [ J ]. Proc Natl Acad Sci U S A, 1991, 88 : 10247-10251.
2Okuyama M W, Melo de Sousa N, Beckers J F. Characteristics of Pregnancy-Associated glycoprotein (PAG) like proteins in red deer [ EB/OL]. 2013, http://hdl, handle, net/2268/158218.
3Bella A, Sousa N M, Dehimi M L, et al. Western analyses of preg- nancy-associated glycoprotein family (PAG) in placental extracts of various mammals [ J]. Theriogenology, 2007, 68 : 1055-1066.
4Huang F, Coekrell D C, Stephenson T R, et al. Isolation, purifica- tion, and characterization of pregnancy-specific protein B from elk and moose placenta [J]. Biol Reprod, 1999, 61 : 1056-1061.
5Wooding F B, Roberts R M, Green J A. Light and electron micro- scope irnmunocytoehemical studies of the distribution of pregnancy- associated glycoproteins (PAGs) throughout pregnancy in the cow: possible functional implications [ J ]. Placenta, 2005, 26 : 807 -827.
6Zoli A P, Beckers J F, Wouters-Ballman P, et al. Purification and characterization of a bovine pregnancy-associated glycoprotein [ J ]. Biol Reprod, 1991, 45: 1-10.
7Xie S, Green J, Bao B, et al. Multiple pregnancy-associated glyeo- proteins are secreted by day 100 ovine placental tissue [ J]. Biol Reprod, 1997, 57: 1384-1393.
8Garbayo J M, Remy B, Alabart J L, et al. Isolation and partial characterization of a pregnancy-associated glyeoprotein family from the goat placenta [ J]. Biol Reprod, 1998, 58 : 109-115.
9Barbato O, Sousa N M, Klisch K, et al. Isolation of new pregnancy- associated glycoproteins from water buffalo ( Bubalus bubalis ) pla- centa by Vicia villosa affinity chromatography [ J ]. Res Vet Sci, 2008, 85 : 457-466.
10Kiewisz J, Melo de Sousa N, Beckers J F, et al. Isolation of preg- nancy-associated glycoproteins from placenta of the American bison (Bison bison) at first half of pregnancy [ J ]. Gen Comp Endocri- nol, 2008, 155: 164-175.
