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Here are some challenges and gaps in understanding these amino acids

BCAAs (branched-chain amino acids) are a group of three essential amino acids leucine, isoleucine, and valine that support muscle protein synthesis and reduce exercise-induced muscle breakdown

Another key influencing factor is the coverage density of PEG on the liposome surface, which determines the spatial conformation of surface polymer chains and subsequent biological behaviors

Jenkins et al., The analysis of proteins and their modifications benefits from continual advancements in liquid chromatography-tandem mass spectrometry (LC-MS/MS), a broadly used tool for proteomic investigations (Aebersold and Mann, 2015), data-dependent acquisition (DDA) (Mann et al., 2001), targeted multiple reaction monitoring (MRM) (Picotti and Aebersold, 2012