肽一种自然或人工的合成物，包括二个或二个以上氨基酸，通过一个氨基酸的酸基和另一个的羧基结合而成。
Any of various natural or synthetic compounds containing two or more amino acids linked by the carboxyl group of one amino acid and the amino group of another.
化学修饰实验发现：巯基、胍基、氨基、羧基和吲哚基可能参与酶活性中心的组成。
Chemical modification studies showed that the sulfhydryl, guanido, amino, carboxyl and indolyl groups may participate in the active center of the enzyme.
绿液预处理和硫酸盐蒸煮工艺参数影响纸浆的羧基含量。
During green liquor pretreatment-kraft pulping process, both pretreatment and kraft cooking variables influence the carboxyl groups content of the pulp.
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