GCA_000009705.1 alr1952 definition signal recognition particle protein GCA_000009705.1 asl2301 definition heterocyst-inhibiting signaling peptide; PatS GCA_000009705.1 alr2304 definition signal peptidase I GCA_000009705.1 alr2975 definition signal peptidase I GCA_000009705.1 all4025 definition similar to AmpG-signal transducer GCA_000009705.1 alr4533 definition signal transducer ampG1 homolog GCA_000009705.1 alr4577 definition lipoprotein signal peptidase