Hbt May not function as an oxygen storage or transport protein, but might act as an oxygen sensor or play a role in electron transfer, possibly to a bound oxygen molecule. Non-symbiotic hemoglobin GLB1 HB MALAEADDGAVVFGEEQEALVLKSWAVMKKDAANLGLRFFLKVFEIAPSAKQMFSFLRDSDVPLEKNPKLKTHAMSVFVMTCEAAAQLRKAGKVTVRETTLKRLGATHLRYGVADGHFEVTGFALLETIKEALPADMWSLEMKKAWAEAYSQLVAAIKREMKPDA ZEAmp GLB1 165 HBL_ZEAMP