nucleoside
核苷; 核甙
核□; 核□
nucleoside n 1 :
a glycoside formed by partial hydrolysis of a nucleic acid nucleoside \
nucleoside \
n . (
Biochem .)
A type of molecule found in all living organisms ,
present mostly in chemically combined form as a component of nucleic acids ,
and also in smaller amounts in free form ,
consisting of a pentose sugar bound to a purine or pyrimidine base ;
two types of nucleoside , {
ribonucleoside }
and {
deoxyribonucleoside },
are present .
The most common bases present in nucleosides are adenine ,
cytosine ,
uracil ,
guanine ,
and thymine ,
and to a lesser extent hypoxanthine and other bases are found .
The most commmon ribonucleosides composed from these bases are called adenosine ,
cytidine ,
uridine ,
and guanosine .
The forms esterified with orthophosphoric at the 5 -
position of the pentose are called nucleotides .
The nucleotides form the monomer units which are combined into DNA and RNA ,
which carry the genetic information required for reproduction in all known organisms .
[
PJC ]
安裝中文字典英文字典查詢工具! 中文字典英文字典工具:
複製到剪貼板
英文字典中文字典相關資料:
Jalan : Japan Hotels RyokanBooking Site 沖縄県のホテル・旅館 - 宿泊予約は【じゃらんnet】 福岡県のホテル・旅館 - 宿泊予約は【じゃらんnet】 京都府のホテル・旅館 - 宿泊予約は【じゃらんnet】 岡山県のホテル・旅館 - 宿泊予約は【じゃらんnet】 鹿児島県のホテル・旅館 - 宿泊予約は【じゃらんnet】 岐阜県のホテル・旅館 - 宿泊予約は【じゃらんnet】 大分県のホテル・旅館 - 宿泊予約は【じゃらんnet】 HOTEL OOSADO（ホテル大佐渡） - 宿泊予約は＜じゃらんnet＞ THE ORIENT - 宿泊予約は＜じゃらんnet＞