In contrast, the concentration levels of arginine, asparagine, aspartic acid, cystine, glutamic acid, leucine, serine, taurine, tryptophan, BCAAs, and SAAs, as well as the BCAA/AAA ratio (the ratio of BCAAs to AAAs), were significantly lower at certain time points during the occurrence of severe sepsis (P<0. Here, PCSK1N is linked to Sepsis.