Diamond Aligner Options: Understanding the '--id -50' Parameter

In Diamond, the Aligner options parameter '--id -50' indicates the minimum threshold for a match to be considered valid. Specifically, it dictates that for each query sequence, a reference sequence must have a score at least 50 points lower than the top-scoring match to be accepted as a valid alignment. The value of this parameter can be adjusted depending on the desired level of stringency in the matching process.