Since 2002, the journal has published more than 170 relevant manuscripts in form of Research articles, Technical notes, Reviews and Commentaries, highlighting the role of the hosting cell from both biological and technological sides. hosting cell from both biological and technological sides. The diversity of microbial cell types being incorporated as cell factories (namely bacteria, archae, yeast and filamentous fungi), the methodological adaptation of productive processes (through new genetic engineering tools, microreactors, metagenomic approaches etc) and the diversity of fields in which cell factories become critical (structural biology, food microbiology, natural products, biominery, nanotechnology and biosensing among others), has dramatically expanded the scope covered by Microbial Cell Factories. The journal has published excellent contributions in those areas, many of them highly cited, and it has been extremely well received by the scientific community becoming now a reference in the current microbial biotechnology literature. Thomson Reuters (ISI) has just released the first official impact factor for Microbial Cell Factories, an impressive 3.36 (for 2007), placing the journal in position 31 (out of 138 listed journals) of the Biotechnology and Applied Microbiology subject. The readers should note that in June’s edition of the Journal Citation Reports (JCR) the impact factor of Microbial Cell Factories was erroneously reflected due to a failure in the system aggregating citations. The fault has been corrected in November’s edition (on November 20), so the readers Betamethasone and potential authors should now update their records. The journal has published relevant Betamethasone contributions in specific fields, some of them offering new scientific Jun concepts or summarizing the current state-of-the-art in key methodologies and technical approaches. Regarding protein production, a special attention has been paid to recombinant protein folding and Betamethasone misfolding, especially in conventional hosts such asE. coli. In this regard, the nature, formation and physiological processing of inclusion bodies [1,2], in vitro protein refolding [3], the mechanics of bacterial quality control system [4] and the general conformational stress responses under a host comparative overview [5] have been discussed. Also, the mechanics of in vivo protein disaggregation has been extensively revised [6] and the scientific and technical implications of protein folding evaluated, conceptually [7, 8] and methodologically [9-11]. Also, several authors have described Betamethasone the successful production of antibodies and other proteins of biotechnological interest inBacillus megateriumand related species [12,13], while Zweers and coauthors have recently reviewed the use and properties ofB. subtilisand other species as cell factory for protein production of complex proteins [14], stressing the value of this gram-positive genera as cell factory. Other hosts such as fungi [15,16], lactobacilli and lactococci [17-19] and yeasts [20] have been also revised through different examples and under diverse perspectives. Finally, novel hosts such as cold-adapted bacteria [21] or hyperthermoacidophilic archae [22] and their implementation for protein production have been evaluated. From the methodological point of view, purification, analysis of protein aggregation [23,24] and other aspects of protein production and purification have been considered [25,26], while the novelty and biotechnological interests of novel products such as the spider silk proteins [27] have been stressed. Since the launch, Microbial Cell Factories has focussed strongly on metabolic engineering. Following a process chain, substrate utilization, and the availability of fresh substrates appears as the 1st essential topics. Improved utilization of already founded substrates like glucose (examined in [28]) or sucrose [29] was highlighted. Utilization of the lignocellulose monomer xylose, Betamethasone was a topic of great interest over the last years [30-33]. Following a process chain, metabolic engineering for the production of bioorganic molecules has been highlighted towards organic acids [34], amino acids [35], secondary metabolites [36,37] and biopolymers [38]. To establish engineered production strains, screening and analysis tools need to be applied. Mattanovich and Borth [39] examined solitary cell sorting applied to biotechnology. Analysis of transcript rules by DNA microarrays and alternate techniques were applied to protein generating microorganisms [40], as well as amino acid [41] and antibiotics production [42]. Applications and pitfalls of transcriptomics was also examined [43]. Proteomics the differential large quantity of cellular proteins in different conditions was examined comprehensively by Graham et al. [44]. While metabolomics methods have been founded in the last decade, their software to microbial cell factories are presently upcoming [45]. Applications towards ethanol and biomass [46] and amino acids.