Cluster of orthologous group (COG) classification of the differentially expressed proteins identified in spermatozoa protein extracts from high quality samples compared with low quality groups.

<p>(A) <i>A</i>. <i>baerii</i>. (B) <i>A</i>. <i>schrenckii</i>. (C) overlapped results from both species. Red columns represent upregulated proteins and green columns represent downregulated proteins. Classification: Information storage and processing [J] Translation, ribosomal structure and biogenesis [A] RNA processing and modification [K] Transcription [L] Replication, recombination and repair [B] Chromatin structure and dynamics Cellular processes and signalling [D] Cell cycle control, cell division, chromosome partitioning [Y] Nuclear structure [V] Defence mechanisms [T] Signal transduction mechanisms [M] Cell wall/membrane/envelope biogenesis [N] Cell motility [Z] Cytoskeleton [W] Extracellular structures [U] Intracellular trafficking, secretion, and vesicular transport [O] Posttranslational modification, protein turnover, chaperones Metabolism [C] Energy production and conversion [G] Carbohydrate transport and metabolism [E] Amino acid transport and metabolism [F] Nucleotide transport and metabolism [H] Coenzyme transport and metabolism [I] Lipid transport and metabolism [P] Inorganic ion transport and metabolism [Q] Secondary metabolites biosynthesis, transport and catabolism Poorly characterized [R] General function prediction only [S] Function unknown.</p>