83. 如下圖所示之網路，求電流 I 之值為何？初等考 111 (A)–2 A (B)2 A (C)–4 A (D)4 A

1. By adding SDS (sodium dodecyl sulfate) during the electrophoresis of proteins, it is possible to: (A) determine a protein’s isoelectric point (B) determine an enzyme’s specific activity (C) determine the amino acid composition of the protein (D) preserve a protein’s native structure and biological activity (E) separate proteins exclusively on the basis of molecular weight.