Studies on yak hemoglobin (Bos grunniens, Bovidae): structural basis for high intrinsic oxygen affinity? |
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Authors: | R Lalthantluanga H Wiesner G Braunitzer |
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Abstract: | Two types of alpha- and two types of beta-chains are found in the hemoglobin of yak population. The complete amino-acid sequences of the four polypeptide chains were determined. The two alpha-chains differ by two and the two beta-chains by three amino-acid substitutions. The substitution of valine at position 135 in the beta II-chain may be responsible for the high intrinsic oxygen affinity of yak hemoglobin. |
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