Updated project metadata. LC-MS/MS analysis of glycopeptides of protein disulfide-isomerase (PDI1), etanercept, erythropoietin (EPO), low affinity immunoglobulin gamma Fc region receptor III-A (FCGR3A), and spike glycoprotein (S) from wild type and Lec1 (GnT1-/-) HEK293 cells