2句生物专业英文翻译Letter sequence representation (LSR) of DNA sequen

2句生物专业英文翻译
Letter sequence representation (LSR) of DNA sequences represents each base by a letter of four different letters such as A, T, G and C.
Similarly for protein sequences, it represents each amino acid by a letter of twenty different letters such as A, R, N, D, C, Q, E, G, H, I, L, K, M, F, P, S, T, W, Y and V.