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Table 3 The most frequent single-word, two-word and three-word descriptors, along with their total frequency in the corpus

From: Mining semantic networks of bioinformatics e-resources from the literature

Single word descriptors

Two-word descriptors

Three-word descriptors

gene: 13,585

gene expression: 1,147

protein-protein interaction: 308

method: 8,203

secondary structure: 887

multiple sequence alignment: 295

protein: 6,417

protein sequence: 780

gene expression data: 262

sequence: 5,991

protein structure: 574

amino acid sequence: 257

analysis: 4,287

microarray experiment: 488

Smith-Waterman algorithm: 48