Ribosomal proteins expression and phylogeny in alpaca (<i>Lama pacos</i>) skin

Ribosomal proteins (RP) has been reported as a central player in the translation system, and are required for the growth and maintenance of all cell kinds. RP genes form a family of homologous proteins that express in the stable pattern and were used for phylogenetic analysis. Here we constructed a cDNA library of alpaca skin and 13,800 clones were sequenced. In the cDNA library, RP genes from skin cDNA library of alpaca were identified. Then 8 RP genes were selected at random and built the phylogenetic trees from the DNA sequences by using parsimony or maximum likelihood methods for molecular and evolutionary analysis of ribosomal proteins. The results showed that the 42 RP genes of alpaca have been expressed in alpaca skin. They were highly conserved. The phylogeny inferred from all these methods suggested that the evolutionary distances of alpaca RP genes were closer to rat.

一株靶向沙贝病毒高度保守的S2亚基的广谱中和纳米抗体

新型冠状病毒感染给人类健康和全球公共安全带来了巨大威胁,但是病毒仍在持续变异产生新的变异毒株,尤其OmicronBQ.1.1和XBB变异株,完全逃逸现有抗体药物,疫苗保护效力也严重降低。此外,多种动物源新冠相关冠状病毒(沙贝病毒)具有感染人的危险。