identical subunits (>= % sequence identity over % of the length of two proteins). while a single protein chain with l-amino acids cannot be symmetric (point group c ), protein complexes with quaternary structure can have rotational and helical symmetry. complexes are considered symmetric if identical...
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hundreds of compounds, some of which may be gmos. these compounds can come from substances that are nowhere close to the actual thing. for example, they might take some castoreum from a beaver ( ) to make a flavoring that resembles vanilla – without ever using any vanilla beans. but, hey, it's "natural...
department, southeast asian fisheries development center the manual contains guidelines on the detection of antibiotic and pesticide residues in aquaculture products. different methods for the analysis of the two chemicals are discussed. the manual is expected to benefit all those who are involved in...