respiratory pigment

respiratory-pigment的词性：
n.（名词）

1. Any of various colored conjugated proteins, such as hemoglobin, that occur in living organisms and function in oxygen transfer in cellular respiration.
呼吸色素：任何一种有色结合蛋白质，例如血色素，产生于活的有机体中，并在细胞呼吸中进行氧的转换