histone carboxyltransferases are a class of enzymes that carboxylate certain amino acid sequences in histone proteins. a research team found that transcription of gene r decreases when carboxyltransferase activity is inhibited. which scientific claim is most consistent with these findings? responses dna carboxylation inhibits transcription of gene r dna carboxylation inhibits transcription of gene r histone modifications of genes are usually not reversible. histone modifications of genes are usually not reversible. histone carboxylation condenses the chromatin at gene r so transcription factors cannot bind to dna histone carboxylation condenses the chromatin at gene r so transcription factors cannot bind to dna histone carboxylation opens up chromatin at gene r so transcription factors can bind to dna more easily
