>4s21_A mol:protein length:525 Bacteriophytochrome (Light-regulated signal transduction histidine kinase), PhyB1MGSSHHHHHHSSGLVPRGSHMTEGSVARQPDLSTCDDEPIHIPGAIQPHGLLLALAADMTIVAGSDNLPELTGLAIGALIGRSAADVFDSETHNRLTIALAEPGAAVGAPIAVGFTMRKDAGFVGSWHRHDQLVFLELEPPQRDVAEPQAFFRRTNSAIRRLQAAETLESACAAAAQEVREITGFDRVMIYRFASDFSGEVIAEDRCAEVESYLGLHFPASDIPAQARRLYTINPVRIIPDINYRPVPVTPDLNPVTGRPIDLSFAILRSVSPVHLEYMRNIGMHGTMSISILRGERLWGLIACHHRKPNYVDLDGRQACELVAQVLAWQIGVMEEQAITRQTLKGQAIQRSLINDIEQLHDHRAGLARNSEALLELMGASGLCLHSREGVITIGQTPPGPIIDQLAQLAGRSGGSELFQTDRLSTIIPEAGAFAEVASGVLAVPLSRTPPRRVMLWFRPEVAQTVYWAGNPDKSVTAESGRLRPRTSFAAWTEQTHGRAIAWQPHEVAAAVEIRDLIIDVILRN