1.2.1.25 2-oxobutanoate degradation I - - PWY-5130 1.2.1.25 anteiso-branched-chain fatty acid biosynthesis - - PWY-8173 1.2.1.25 even iso-branched-chain fatty acid biosynthesis - - PWY-8175 1.2.1.25 isoleucine metabolism isoleucine metabolism - - 1.2.1.25 L-isoleucine degradation I - - ILEUDEG-PWY 1.2.1.25 L-leucine degradation I - - LEU-DEG2-PWY 1.2.1.25 L-threonine degradation V - - PWY66-428 1.2.1.25 L-valine degradation I - - VALDEG-PWY 1.2.1.25 odd iso-branched-chain fatty acid biosynthesis - - PWY-8174 1.2.1.25 valine metabolism valine metabolism - -