[kəud]
①守则，规则，法规：控制行为的法则；②密码，符号：传递信息的系统
习惯用语degeneracy of code
密码的简并性：见degeneracygenetic code
遗传密码：染色体的多核苷酸链中核苷酸的排列顺序，控制遗传信息向蛋白质的传递，即决定由细胞合成的每一个蛋白质的多肽链中氨基酸的顺序。在DNA中遗传信息是通过四种碱基(二种嘌呤：腺嘌呤和鸟嘌呤，二种嘧啶：胸腺嘧啶和胞嘧啶)编码而形成。每相邻的三个碱基(密码子)决定着一种特定的氨基酸进入多肽链。在RNA中由尿嘧啶代替胸腺嘧啶(见附表)，另见codon，transcription和translationtriplet code
三联密码：DNA分子中同为一种氨基酸编码的三个碱基序列(核苷酸)；见triplet- electroanesthesia
- electroappendectomy
- electroaugmentation
- electrobiology
- electrobioscopy
- electrocardiogram
- electrocardiograph
- electrocardiography
- electrocatalysis
- electrocautery
- electrochemistry
- electrocholecystectomy
- electrocholecystocausis
- electrochromatography
- electrocision
- electrocoagulation
- electrocochleogram
- electrocochleograph
- electrocochleographic
- electrocochleography
- electrocontractility
- electroconvulsive
- electrocorticogram
- electrocorticography
- electrocryptectomy