氧o meaning in English

oxygen

4 . the interaction between la3 + and mp - 11 would decrease in the intensity of the soret band and shift the band position , because of the strong coordination action of la3 + with o of the carboxyl group in the heme group and weak interaction of la3 + with o of the amido group in the peptide . the interaction also increases in the non - planarity of the heme group
由于la ~ ( 3 + )与血红素上羧基氧o配位键合作用较强，而与多肽链上的酰氨氧o键合作用较弱，因此使mp - 11的soret带吸收值下降，峰位红移，血红素环的非平面性增加。