Papers on
Siglec-6
An updated view of leptin on implantation and pregnancy: a review.McFarlane et al., Armidale, Australia. In Physiol Res, 2013
Leptin circulates in biological fluids both as free protein and in a form that is bound to the soluble isoform of its receptor or other binding proteins such as one of the immunoglobulin superfamily members Siglec-6 (OB-BP1).