Molecular Cloning and Sequence Analysis of Snowdrop (Galanthus nivalis) Lectin Gene
雪花莲外源凝集素基因的克隆及序列分析

Snowdrop lectin genes were cloned from DNA extracted from snowdrop young leaves by PCR. Sequence analysis revealed that the cloned gene GNA12 (Galan-thus nivalis agglutinin) which encode mature lectin and GNA34 which encode precursor lectin have a high homology with previously reported LECGNA2 gene. The sequence coding for mature lectin showed 97% and 98% homology at nucleotide and amino acid level respectively. However a 9-base direct repeat in the sequence coding for signal pep-tide of GNA34 makes it different from other previously reported LECGNA genes.