国产成人亚洲精品无码青app,白丝紧致爆乳自慰喷水,国产疯狂女同互磨高潮在线观看,jizzjizz少妇亚洲水多

Covalently immobilized rat anti-human immunoglobulin (IgG) monolayers on?thiol-modified gold substrates and human IgG linked with the tips were fabricated using?the self-assembled monolayer method, and interactions between these systems were studied?by friction force microscopy (FFM). In addition to observation of distinct nanostructures of?protein monolayers due to recognition events, FFM also quantified the friction force due to?protein–protein-specific interactions. The average friction force due to interactions between?the antigen functionalized tip and the antibody monolayer was determined as 200–250 pN,?significantly greater than that between either the bare tip and the antibody monolayer (0–50 pN), or the blocked antigen tip and the antibody monolayer (50–100 pN), indicative of?antigen/antibody-specific interactions. These results, taken together, suggest that FFM is?not only capable of tracking recognition events, but also quantifying the friction force dueto specific interactions between biological molecules, such as antigen and antibody.