有些唾液酸位于溶酶体的外表面.Some sialic acid is on the external surface of lysosomes.包括酯酶的一些, 可以位于完整溶酶体的外表面.Some, including an esterase, may be on the outside of intact lysosomus.正常情况下细胞溶质中不存在溶酶体的酶.Lysosomal enzymes are not normally ...