A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 103-50-4, Name is Benzyl ether, molecular formula is C14H14O. In an article, author is Zhou, Chuang,once mentioned of 103-50-4, Category: ethers-buliding-blocks.
Characterization of Olfactory Receptor Repertoires in the Endangered Snow Leopard Based on the Chromosome-Level Genome
Olfaction is a complicated process that begins with the specific binding of volatile odorant molecules to dedicated olfactory receptors (ORs) in the olfactory epithelium and plays a pivotal role in the survival of mammals. The OR subgenome of the snow leopard has remained largely unexplored, and thus, investigation of the OR system would shed light on the evolutionary dynamics of the snow leopard OR repertoires and genetic evidence for environmental adaptation. In this study, we conducted genome-wide identification and characterization of OR genes in the snow leopard and compared them to all other Panthera species. A total of 213, 294, 624, 305, and 253 functional OR genes were identified in the snow leopard, lion, jaguar, leopard, and tiger, respectively. The phylogenetic relationships of functional Panthera OR genes were illustrated, which comprised 69 families and 350 subfamilies distributed in two classes (Class I and Class II). Comparative analysis of the five Panthera species indicated 115 shared and 5 snow leopard-specific clusters. The potential odorant specificity of certain snow leopard OR genes was identified by similarities to human protein sequences and we identified odorants such as eugenol methyl ether that had the most OR genes. Since our references for odorants were from human studies, possible odorants from snow leopard-specific OR genes need further investigation. The lowest number of OR genes for the snow leopard among Panthera species possibly revealed the association between OR gene family contraction and high-altitude adaptation, which needed further and deeper investigation. This systematic study of OR genes in the snow leopard will provide a solid foundation for further study of olfactory function and variation in the snow leopard.
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