Assertion: β alanine | /r/HasProperty | figure 4
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Source sentences:
text: Arginine is not only a source of nitrogen (arginine cleavage by arginase yields urea which can be broken down to ammonium by urease, and ammonium can in turn be refixed by glutamine synthetase), but also a precursor of polyamines (putrescine, spermidine, spermine) and thus β-alanine ( Figure 4 ).