用降落PCR的方法获得了丹参锚蛋白重复序列家族基因（SmARP）.生物信息学显示，SmARP所编码蛋白的分子质量为19,064 kD,理论等电点为8.4，是一种不稳定而且无信号肽和无跨膜区域的蛋白.该蛋白的二级结构中主要存在α 螺旋( 39.64% )和无规卷曲(42.01%)，其三维结构模型中每个锚蛋白重复序列折叠成两个反向平行的α-螺旋，每两个α-螺旋中间形成一个长环.实时荧光定量PCR结果显示，该基因在丹参的根、茎、叶、花中均有表达.

An ankyrin repeat family protein gene（SmARP）from Salvia miltiorrhiza was cloned using TD-PCR.Bioinformatics analysis showed that the calculated molecular mass is 19,064 kD, and the theoretical isoelectric point is 8.4. Ankyrin repeat protein in S.miltiorrhiza is an unstable protein without signal peptide and transmembrane segments. Predicted secondary structure of SmARP contain, alpha helix( 39.64% )and random coil (42.01%).The three dimensional structure model of SmARP showed that each repeat folds into two antiparallel α-helices followed by a long loop. The real-time PCR results showed SmARP expresses in roots, stems，leaves and flowers of S.miltiorrhiza.