Multiple biochemical processes create chemical modifications of protein molecules, further diversified by association with distinct structures at defined locations of a cell.
Some proteins consist of more than one polypeptide chain, and the association of these subunits in the protein gives rise to the quaternary structure.
一些蛋白质不只是由一个多肽链组成的，并且这些蛋白质亚基的结构产生了四级结构的。
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Objective To investigate the association of lipoprotein receptor-related protein 5(LRP5) gene Q89R, A1330V polymorphism with bone mineral density(BMD) in premenopausal Northern Chinese women.