化学性质
属性
敏感性
对湿度敏感
存贮条件
储存温度 -20°C
描述
产品介绍
Lens culinaris lectin or agglutinin (LCA) is isolated from Lens culinaris (lentil) seeds and purified by affinity chromatography. The lectin has two subunits and a molecular weight of 46 kDa and it forms a complex together with sucrose. Lectins are, due to their specific binding to carbohydrate struc- tures on the cell surface or elsewhere useful in haematology, immunology or as specific markers for membrane glycoprotein structures. LCA’s carbohydrate specificity is D-mannose and D-glucose and the two isomers LCA-A and LCA-B agglutinates human red blood cells, although this reaction is not blood group specific. LCA is also a useful component in affinity chroma- tography columns for the separation of glycoconjugates. Lens culinaris lectin is supplied as a white lyophilized powder from 1 mM CaCl2, 1 mM MnCI2 and 1 mM MgCI2. No preservatives are added. In isoelectric focusing, the lectin generates two major bands at pI 8.15, 8.45 and one minor band at pI 8.65. The activity of the lectin is determined by haemagglutination with human blood. Lens culinaris lectin agglutinates a 2% suspension of human erythrocytes at a lectin concentration of ≤8 μg/ml in 0.9% saline solution (NaCl) after 2 h at 25°C. Adding 60 mM methylmannoside yields an inhibition with a lectin titer that is at least 16-fold weaker than the control.Addition of Mn2+ and Ca2+ to the reconstitution buffer will enhance hemagglutination activity.
别名
备注
Lens culinaris lyophilized lectin may be reconstituted with 2 ml of deionized water before use, spin the vial gently until full dissolution. Aggregation is thought to occur in the presence of high concentrations of 2-mercaptoethanol.
应用
Haemagglutination studies;Cell agglutination studies;Component in affinity columns;Separation of glycoconjugates -----------------------
密度 :1.27g/cm³
沸点 :142.6ºC at 760mmHg
熔点 :198-201 ℃(lit.)
分子式 :C4H8ClNS
分子量 :137.63100
闪点 :40.1ºC
精确质量 :137.00700
PSA :49.15000
LogP :2.39240
外观性状 :白色结晶固体
折射率 :1.63
储存条件 :
本品应密封于4℃干燥避光保存。
稳定性 :
常温常压下稳定,结晶。有吸湿性。对空气敏感。熔点198~201℃。
计算化学 :
1.疏水参数计算参考值(XlogP):无
2.氢键供体数量:2
3.氢键受体数量:2
4.可旋转化学键数量:0
5.互变异构体数量:2
6.拓扑分子极性表面积49.2
7.重原子数量:7
8.表面电荷:0
9.复杂度:69.9
10.同位素原子数量:0
11.确定原子立构中心数量:0
12.不确定原子立构中心数量:0
13.确定化学键立构中心数量:0
14.不确定化学键立构中心数量:0
15.共价键单元数量:2
更多 :
1. 性状:结晶,有吸湿性对空气敏感
2. 密度:不确定
3. 相对蒸汽密度(g/mL,空气=1):不确定
4. 熔点(℃):198-201
5. 沸点(℃,常压):不确定
6. 沸点(℃,715mmHg):不确定
7. 折射率:不确定
8. 闪点(℃):不确定
9. 比旋光度(º ):不确定
10. 自燃点或引燃温度(℃):不确定
11. 蒸气压(kPa,25℃):不确定
12. 饱和蒸气压(kPa,60℃):不确定
13. 燃烧热(KJ/mol):不确定
14. 临界温度(℃):不确定
15. 临界压力(KPa):不确定
16. 油水(辛醇/水)分配系数的对数值:不确定
17. 爆炸上限(%,V/V):不确定
18. 爆炸下限(%,V/V):不确定
19. 溶解性:不确定
危险属性
-----------------------
个人防护装备 : Eyeshields; Gloves; type N95 (US); type P1 (EN143) respirator filter
安全声明 (欧洲) :S22-S24/25
危险品运输编码 :NONH for all modes of transport
WGK德国 :3
海关编码 :2934999090