A proteinic biomass preparation comprising a non-native organism of the Clostridia class, which organism expresses (i) a modified aspartate kinase； (ii) a modified homoserine dehydrogenase； (iii) a modified homoserine kinase； (iv) a modified anthranilate synthase； (v) a functional lycopene pathway and the genes crtY, crtW, and crtZ； and/or (vi) a functional oleic acid pathway and the four gene operon (pfaABCD). Methods of producing proteinic biomass preparations are also described.
