I'm not an expert in either biology or machine learning (that's why I haven't made any comments on content), so the significance of this soft margin parameter in the SVN model is unfamiliar to me. If it is basic domain knowledge, known to all machine-learning researchers, and it is always called C, then I don't think anything should change about this sentence. However, if it is not universally recognizable, I think this is an appropriate place to put a quick clarifying sentense introducing the importance of C, the soft margin parameter, and its formal significance in the algorithm.