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.

(A) A. baerii. (B) A. schrenckii. (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.