甲硫氨酸

甲硫氨酸（Met）依赖性是肿瘤代谢缺陷的重要特征之一。

Methionine dependence is one of characteristic metabolism deficiency in cancer cells .

光谱法和电化学法研究甲硫氨酸二肽与DNA的相互作用

Studies on the Interaction of Methionine Dipeptide with Deoxyribonucleic Acid by Spectroscopy and Electrochemical Method

甲硫氨酸维B1注射液中维生素B1的有关物质及含量的测定

RP-HPLC determination of vitamin B_1 and related substances in methionine and vitamin B_1 injection

高效液相色谱法测定甲硫氨酸维B1注射液的含量

HPLC determination of methionine and Vitamin B_1 injection

高甲硫氨酸诱发高同型半胱氨酸血症对抗凝血酶-Ⅲ，蛋白C和血管性血友病因子的影响

Effects of methionine-induced hyperhomocysteinemia on protein C , antithrombin - ⅲ and von willebrand factor

HPLC测定注射用甲硫氨酸维生素B1中甲硫氨酸的含量

Content determination of methionine in Methionine and Vitamin B_1 for injection by HPLC

几个品种中甲硫氨酸（MET）的含量都较低，属微量。

The content of MET is relatively low in several varieties , belonging to the trace .

人cDNA序列中二类甲硫氨酸密码子的区分

Recognition Analysis of Two Kinds of Methionine Codons in Human cDNA Sequences

大鼠延髓内含前-原脑啡肽mRNA、甲硫氨酸-脑啡肽和亮氨酸-脑啡肽神经元的分布

Distribution of preproenkephalin mrna , met-enkephalin and leu-enkephalin containing neurons in the medulla oblongata of the rat

甲硫氨酸氨基肽酶负责切除新生肽链N端的起始甲硫氨酸，其编码基因是细胞存活的必需基因。

Methionine aminopeptidase ( MAP ) is responsible for removing N-terminal methionine from nascent peptides and the gene is essential to the cell .

甲硫氨酸合成酶还原酶基因多态性与肿瘤易感性关系的Meta分析

Methionine Synthase Reductase Gene Polymorphism and Cancer Risk : a Meta-Analysis

用胆素-甲硫氨酸缺乏饮食诱导雄性Wistar鼠肝脏脂肪变性。

Liver steatosis was induced in male Wistar rats by a choline-methionine-deficient diet .

草木樨状黄芪变异系中甲硫氨酸代谢相关cDNA的分子克隆及其在大肠杆菌中的表达

Molecular cloning of methionine-metaboly correlated cDNA in Astragalus melilotoides Pall . variant line and its expression in E.coli

表皮生长因子和甲硫氨酸脑啡肽诱导人白细胞c-fos基因表达的研究

Effects of EGF and MEK on c-fos protooncogene expression in human blood leucocytes

利用重组Pichiapastoris生产腺苷甲硫氨酸

Production of SAM by Recombinant Pichia pastoris

去甲硫氨酸全肠外营养加5-Fu对胃癌患者毒副作用的研究

Study of methionine-deprived total parenteral nutrition plus 5-Fluorouracil in gastric cancer patients : toxic and adverse effects

在SIV感染组加入吗啡或甲硫氨酸脑啡肽进行时间曲线实验时，p53含量较低。

Lower contents of p53 were observed in 72 hours treatment with SIV and morphine sulfate or methionine enkephalin .

DNA甲基化就是在DNA复制后，甲基转移酶（甲基化酶）催化将S-腺苷-甲硫氨酸上的甲基基团连接到DNA分子的胞嘧啶碱基上，进行DNA修饰的过程。

DNA methylation patterns are established and maintained by DNA methyltransferases , which catalyze the transfer of the methyl group from S-adenosylmethionine ( SAM ) to C - 5 position in the pyramiding ring of cytosine .

DNA甲基化（DNAMethylation）是目前已知的唯一天然的DNA共价修饰方式，由DNA转移酶催化，将S-腺苷甲硫氨酸上的甲基转移到胞嘧啶嘌呤环的第五位碳原子上。

DNA methylation is the only known covalent modification of DNA molecule . It is accomplished by transfer of the methyl group from S-adenosyl methionine to 5 position of the purine ring of cytosine .

目的：在体外探讨甲硫氨酸脑啡肽（MEK）与缓激肽（BK）的相关性。

Objective : To explore and discuss the correlation between MEK and BK in vitro .

顺式还原酮加双氧酶（ARD）家族参与甲硫氨酸循环，并普遍存在于从微生物到动植物的各种生物体中。

The aci-reductone dioxygenase ( ARD ) family is evolutionarily conserved from bacteria to plants and animals .

所有的ORF都是以缬氨酸或者甲硫氨酸起始的，长度都长于100个氨基酸。

All these ORFs started with Valine or Methionine , and were greater than 100 amino acids in length .

结论：该法简便、准确、专属性好，可以用于甲硫氨酸维B1注射液的含量测定。

Conclusion : The method was simple , accurate , suitable for the determination of methionine and vitamin B1 in methionine and vitamin B1 injection .

该菌在含有甲醇和甲硫氨酸的培养基中生长5d后，其细胞内的SAM的产量比原始菌株提高了30余倍。

This strain had higher SAM synthetase activity and higher SAM production capacity than the original strain , when cultured in medium containing methanol and methionine .

而当甲硫氨酸摄入量较低时，同型半胱氨酸又通过一条包含叶酸和维生素B12的途径再循环生成甲硫氨酸。

When methionine intake is low , homocysteine is recycled back to methionine in a process involving folic acid and vitamin B12 .

目的：探索人胃癌和胃粘膜上皮原代细胞在体外不含甲硫氨酸（Met）而含同型半胱氨酸（Hcy）培养基（Met-Hcy+）中能否正常生长及是否存在Met依赖性。

Objectives : To study the methionine dependence ( Met-dependence ) of human primary gastric cancer cells in vitro when Met in the culture medicine was replaced by its precussor homocysteine ( Hcy ) .

以黄瓜种子为材料，采用甲硫氨酸（Methionine，Met）浸种的方法，研究了不同浓度Met对黄瓜种子萌发、幼苗生长及离体子叶成花的影响。

The effects of imbibition with different concentrations of methionine ( Met ) for 3 hours on seed germination , growth of cucumber seedlings , and flowering of detached cucumber cotyledon in vitro were studied .

促进脂肪代谢，抑制脂肪肝，其机制是甜菜碱能显著促进体内腺苷甲硫氨酸（SAM）的合成，降低肝脏中胆固醇和甘油三酯的含量；

It also can enhance the metabolism of fat , inhibit the steatosis , the mechanism is that the betaine can increase the synthesis of SAM , decrease the triglycerides and cholesterol .

核开关在特定细菌中，参与调控包括维生素B12和甲硫氨酸生物合成等在内的代谢途径。

They are believed to regulate in a wide set of fundamental metabolic pathways including vitamin B 12 and methionine biosynthesis in bacteria .

当过量摄入甲硫氨酸时，同型半胱氨酸通过一条含有维生素B6依赖酶的途径转化成半胱氨酸；

In periods of excess methionine intake , homocysteine is converted to cysteine in a process that involves a vitamin B6-dependent enzyme .