筛选产品
4arm-PEG5K, average MN 5,000, SH, thiol reactive
4arm-PEG5K, average MN 5,000, NH2, carboxyl reactive
4arm-PEG5K, average MN 5,000, COOH, amine reactive
4arm-PEG5K, average MN 5,000, Succinimidyl Carboxymethyl Ester, amine reactive