Biological and biochemical characterization of venom from the broad-banded copperhead (Agkistrodon contortrix laticinctus): isolation of two new dimeric disintegrins [0.03%]
广铜头蛇（Agkistrodon contortrix laticinctus）毒液的生物学和生化特性鉴定：两种新的二聚体整合素抑制剂的分离
Alexis Rodríguez-Acosta,Sara Lucena,Andrea Alfonso et al.
Alexis Rodríguez-Acosta et al.
Disintegrins represent a family of effective cell-cell and cell-matrix inhibitors by binding to integrin receptors. Integrins are heterodimeric, transmembrane receptors that are the bridges for these cell interactions. Disintegrins have bee...
Tinbergen's fourth question, ontogeny: sexual and individual differentiation [0.03%]
廷伯根的第四问题：发生学——性别和个体分化
David Crews,Ton Groothuis
David Crews
Based on Tinbergen's view of the study of behavioural development we describe some recent advances and their importance in this field. We argue that the study of behavioural development should combine both proximate and ultimate approaches,...