The invention relates to a novel labeling reactant, suitable for labeling of a biospecific binding reactant using solid-phase synthesis. The invention further concerns new labeling methods. The novel labeling reactant has the formula (I)
wherein
A is a bivalent aromatic structure capable of absorbing light or energy and transferring the excitation energy to a lanthanide ion after the product made by the said solid-phase synthesis has been released from the used solid support, deprotected and converted to a lanthanide chelate;
R is - Z(G' - NH - X) G" - E, where
X is a transient protecting group;
E is a carboxylic acid, its salt, active ester or halide;
Z is the bridge point;
G is a bridge between A and Z, G' is a bridge between NH and Z and G" is a bridge between E and Z.
R' is -COOR''' where R''' is an alkyl of 1 to 4 carbon atoms, phenyl or benzyl.
本发明涉及一种新型标记反应物,适用于使用固相合成法标记
生物特异性结合反应物。本发明还涉及新的标记方法。新型标记反应物具有式(I)
式中
A 是二价芳香族结构,能够吸收光或能量,并在所述固相合成的产物从使用的固 体支持物中释放出来、脱保护并转化为
镧系元素螯合物后,将激发能量转移到
镧系 离子上;
R 是 - Z(G' - NH - X) G" - E,其中
X 是瞬时保护基团;
E 是
羧酸、
羧酸盐、活性酯或卤化物;
Z 是桥点;
G 是 A 和 Z 之间的桥,G'是 NH 和 Z 之间的桥,G "是 E 和 Z 之间的桥。
R' 是-COOR''',其中 R''' 是 1 至 4 个碳原子的烷基、苯基或苄基。