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(A): Lp(a) consists of an LDL-core particle with apolipoprotein B-100 as the major protein, linked to glycoprotein apo(a) by a disulfide bridge. For more details, see text. (B): Negative stain electron microscopy of LDL and Lp(a). Although both particles look comparable, the diameter of Lp(a) is somewhat larger than LDL.
